Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fedd77d30683b1e…

MALICIOUS

PDF

82.4 KB Created: 2021-09-07 15:25:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: b639eeaf4a0144917087df9831fc0034 SHA-1: c4c0bdd3991426eb4a9bbfa758c85ba667969b12 SHA-256: 0fedd77d30683b1e1eddbf6bd9427b0610fc54ba0ed83dd9f0d39052b759f74f
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains a link farm pointing to various domains, some of which are hosted on compromised CMS platforms. The presence of a callback lure suggests the document is designed to trick the user into contacting a malicious entity, likely for a scam or phishing operation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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) 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://n-zvuk.ru/upload/file/mibugokowopunuwaf.pdf In PDF document text
    • https://dafelia.com/files/44213253153.pdfIn PDF document text
    • https://makemycake.gr/wp-content/plugins/super-forms/uploads/php/files/d7m8j1u36nm1qct5v5a9o5oetc/nulirijekitodanekezenoru.pdfIn PDF document text
    • https://eletvital.hu/uploads/files/mifidozite.pdfIn PDF document text
    • https://panegovernance.com/ourprojects/chowki/UserFiles/file/rixolutixuzasebovibeziv.pdfIn PDF document text
    • https://www.brunosistemi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a565943a565---filixokagokut.pdfIn PDF document text
    • https://bilbox.es/wp-content/plugins/super-forms/uploads/php/files/39abdbfa170c2fbfd616ddfa272d93ed/gejixotexetabub.pdfIn PDF document text
    • https://member-amz-seller-system.de/wp-content/plugins/super-forms/uploads/php/files/5e8a95e87136c7c031de9c65eb57a992/39371131166.pdfIn PDF document text
    • http://systemsbiology.at/uploads/assets/file/nubadojilofaduxo.pdfIn PDF document text
    • http://lamorenj.com/userfiles/file/faxajanu.pdfIn PDF document text
    • http://aite-materials.com/upfiles/file/tidosuzavelavinawegida.pdfIn PDF document text
    • https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/160d1b82db8f34---fupuzelonubas.pdfIn PDF document text
    • http://crystalcleanwindowsmn.com/clients/c/cc/cc5f591ab25ef7bbd7a205b431f39e57/File/rikotu.pdfIn PDF document text
    • http://vangphutai.com/images/uploads/files/9176644064.pdfIn PDF document text
    • https://ajitcoatings.com/uploads/75374517806.pdfIn PDF document text
    • https://istanbulbalbir.com/upload/ckfinder/files/befigijog.pdfIn PDF document text
    • http://peaktoppet.com/ck_imgs/files/vuwonazedepugo.pdfIn PDF document text
    • http://clinicacomciencia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606cba67cfd7b---tenosu.pdfIn PDF document text
    • http://am-assets.com/aom/magnolia/userfiles/file/9896856876.pdfIn PDF document text
    • http://math-talk.kr/wp-content/plugins/super-forms/uploads/php/files/9r2fn131p1b7d0pocvmdr3shch/55001358957.pdfIn PDF document text
    • http://dailyxedayhang.com/userfiles/files/zulufajato.pdfIn PDF document text
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/161275c939fb17---53526215526.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=poulan+parts+manualPDF 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_off0000dd60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD60 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f577.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF577 10288 bytes
SHA-256: 2c073442c8042c107d942ebcb909b2d3fea111101079799ebfe707caf45b7dec
font_02_sfnt_off00010ca1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CA1 18168 bytes
SHA-256: 6bc820b2e51c605521b6a89807d9630cb2b3324ef0932a513bdfe209cf38c77a

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