Malicious PDF — malware analysis report

Static analysis result for SHA-256 de282192d67e17ae…

MALICIOUS

PDF

91.4 KB Created: 2021-06-29 01:27:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 6d9df7c4d6b2379dd2d5911305067a0f SHA-1: a28bd91b8ab7b2a759220d24d7648dddfd17eca7 SHA-256: de282192d67e17ae64308640f0c3b26c1ded3dbb9c0feb2083c967c960b6321a
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised WordPress sites, indicating a link farm designed to redirect users to malicious content. The 'SE_CALLBACK_LURE' heuristic suggests a phishing or tech-support scam context. While no scripts were explicitly extracted, the nature of the links and the ML classification strongly suggest the PDF is a lure for further malicious activity, likely involving the download of a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9822

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://livingcircles.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16098bb1cecb36---guwogonuretujenulipes.pdf In PDF document text
    • https://eyestech.in/wp-content/plugins/super-forms/uploads/php/files/b7c4v74fi6j9jb4mgn3rssh47j/98509116644.pdfIn PDF document text
    • http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16087701134a94---84180480353.pdfIn PDF document text
    • http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/160af66ec391e8---7457169274.pdfIn PDF document text
    • http://daoltrading.com/userData/board/file/77016872897.pdfIn PDF document text
    • http://placc.info/up_image/62334535008.pdfIn PDF document text
    • http://aeskulap24h.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f052f4ce8f---durevabunotonij.pdfIn PDF document text
    • http://barrarioservicos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607bffe05a465---niwokavibivute.pdfIn PDF document text
    • https://stakeoutllc.com/wp-content/plugins/super-forms/uploads/php/files/9e43d2642678c3bb425e13b94a854e17/lokini.pdfIn PDF document text
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607622ba6e5fa---fazudikobufimebebumevej.pdfIn PDF document text
    • http://bagpack.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/1609c704627c84---lusuvisupawulanefimari.pdfIn PDF document text
    • https://namastehealth.in/wp-content/plugins/super-forms/uploads/php/files/pe39pvi5qjlbftr8cn5crrvssv/xulitogu.pdfIn PDF document text
    • http://allmedicus.com/userfiles/file/tofonipifen.pdfIn PDF document text
    • https://lllk.ru/wp-content/plugins/super-forms/uploads/php/files/2cf9808eb2afd6b7e5124fc7e9ddad45/43667290054.pdfIn PDF document text
    • https://sirikulsteel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a74356a26ac---xemekixuwesataxozoj.pdfIn PDF document text
    • https://rffsev.ru/wp-content/plugins/super-forms/uploads/php/files/bb5617baf4459cfd3e30421d4d56fdec/24875344527.pdfIn PDF document text
    • http://akcjonariusz.com/UserFiles/file/vobos.pdfIn PDF document text
    • http://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a70e713eb86---lilajazilefumitug.pdfIn PDF document text
    • https://pharmnet.cz/ckfiles/files/files/vejosujalafasenukutolukuf.pdfIn PDF document text
    • https://nadamasristorante.it/file/webudegofikezofum.pdfIn PDF document text
    • https://chefinhogourmet.com/wp-content/plugins/super-forms/uploads/php/files/824991cb69c8dfe9c41efd653295468c/vakoporuwamo.pdfIn PDF document text
    • https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607ca29d49d27---46371254834.pdfIn PDF document text
    • http://ayurveda-shiatsu-qigong-nice.com/upload/files/mukuf.pdfIn PDF document text
    • http://bannermaul.com/userData/board/file/bilabatigudevovu.pdfIn PDF document text
    • https://alzubidi.com/userfiles/files/dezokifobomumafav.pdfIn PDF document text
    • https://flycam.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160821ac5425df---mawedakorur.pdfIn PDF document text
    • http://anhuifan.com/upload_fck/file/2021-5-5/20210505202054457330.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=match+the+term+with+the+correct+definitionPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f6d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6D6 10608 bytes
SHA-256: 01e16b2380f8269f0f8e6704b43f476ff2e984d98529115007219bae97ec513b
font_01_sfnt_off00010ef8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EF8 26240 bytes
SHA-256: 4ae03215a6d0ee19cafe3e0fed0d096e12d435ac5b66c6f89e4a227c28e6f796
font_02_sfnt_off00014614.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14614 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1