Malicious PDF — malware analysis report

Static analysis result for SHA-256 936a0394ec053c10…

MALICIOUS

PDF

83.9 KB Created: 2021-09-20 03:14:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 38ab38b96099ae0664e85a72be8bd424 SHA-1: 202404b6e8e7f8218fb9814c76c79a1e7b9dd44b SHA-256: 936a0394ec053c1019dcb1ca3d75f3161fb7f2c9bb1a0af7c9cd422785bd4d0f
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The document contains numerous embedded URLs, many of which point to disposable hosting or compromised CMS upload storage, suggesting a link farm designed to redirect users. The presence of these links and the ML classifier's high confidence score indicate a phishing or malicious redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9860

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 http://suvenirzp.com/uploads/files/49715105266.pdf In PDF document text
    • http://strojsteel.cz/webpagebuilder/ckfinder/userfiles/files/42171439275.pdfIn PDF document text
    • https://yesilkoyluleriz.biz/resimler/files/safanidumupovozarijuvuwi.pdfIn PDF document text
    • http://rapet.hu/files/73235768834.pdfIn PDF document text
    • https://sibconsulting.com/contents/files/35858378384.pdfIn PDF document text
    • https://mai-avto.ru/upload_files/file/48608727315.pdfIn PDF document text
    • http://tylincms.com/userfiles/files/fovopakirutibugov.pdfIn PDF document text
    • http://matras-devison.com/upload/file/42841010832.pdfIn PDF document text
    • https://medtek.vn/storage/file/bowiwo.pdfIn PDF document text
    • http://alcantara.cz/data/file/4125653466.pdfIn PDF document text
    • https://www.dekleinewerf.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613f7a57e1b1c---64138470162.pdfIn PDF document text
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/16145a1cf727ed---20952059767.pdfIn PDF document text
    • https://sukienmiennam.com/userupload/files/90010080292.pdfIn PDF document text
    • https://bestofbucerias.com/upload/file/tubunoropogibabume.pdfIn PDF document text
    • http://renknh.com/ckupload/files/siwekadixobu.pdfIn PDF document text
    • https://www.hungryalex.com/wp-content/plugins/super-forms/uploads/php/files/518d874458eb59e2466513d392563ef8/jalogo.pdfIn PDF document text
    • http://katela.net/userData/board/file/92419405692.pdfIn PDF document text
    • https://pactforfamilies.org/ckfinder/userfiles/files/81019356624.pdfIn PDF document text
    • http://gelinyuanyi.com/upload_fck/file/2021-9-20/20210920055211143097.pdfIn PDF document text
    • https://beautifullifeuk.com/wp-content/plugins/super-forms/uploads/php/files/d2ae4d9f51b2d9c673595ef5e9724153/80956476424.pdfIn PDF document text
    • http://zeci.nl/im/image/jejokawego.pdfIn PDF document text
    • https://myphambambi.com/webroot/img/files/gotufod.pdfIn PDF document text
    • http://schodylux.pl/userfiles/file/pavozoridulixiruviwifadus.pdfIn PDF document text
    • http://cu-hinothai.com/ckfinder/userfiles/files/faliv.pdfIn PDF document text
    • http://24hnbc.com/assets/ckfinder/core/connector/php/uploads/files/tajanipiberumegizonewo.pdfIn PDF document text
    • https://irepairplus.nl/app/webroot/files/userfiles/files/favikugawubivupalago.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=watch+up+online+free+putlockerPDF 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_off0000e29a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE29A 10592 bytes
SHA-256: 8e0854bfb068573959dc49953a4db8c140891c85e6a93cde79019cc9aedfb9d2
font_01_sfnt_off0000fab7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAB7 18168 bytes
SHA-256: 56d9369f3c453b3a58280177ab30356843edb828e3f5d9fb9512470e961846a1
font_02_sfnt_off000129c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129C2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.