Malicious PDF — malware analysis report

Static analysis result for SHA-256 d92a209f970bc7f8…

MALICIOUS

PDF

80.2 KB Created: 2021-03-19 22:46:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 37e3631b0aed381fd342ea6b710b2405 SHA-1: b8930eb1fdae22849d871593ba1aa928874c9187 SHA-256: d92a209f970bc7f8fdd21342b5ed61abb87ca656c376865fd8e6cf77745318d0
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file is a PDF that contains a large number of external links, many of which point to potentially malicious domains, suggesting a link farm or phishing attempt. The 'SE_CALLBACK_LURE' heuristic indicates the document is designed to trick users into calling a phone number, a common tactic in tech-support scams and callback phishing. While no scripts were explicitly extracted, the presence of numerous external links and the heuristic firings strongly suggest a malicious intent to redirect users to harmful content or engage them in a fraudulent scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://pelibifir.ru/123?utm_term=championship+manager+2018+app
    • http://jobauthor.online/david_deida_woman0baev.pdf
    • http://xozonline.ru/etica_gustavo_escobar_librom7m8w.pdf
    • https://vejugowe.weebly.com/uploads/1/3/4/5/134506523/daseximadisofo.pdf
    • https://cdn.sqhk.co/sebutarukaw/hd0pgeW/ahly_vs_zamalek_match_tickets.pdf
    • https://lumixomenuvaw.weebly.com/uploads/1/3/4/7/134745504/wavikukige.pdf
    • https://cdn.sqhk.co/vabalogu/doTZ13t/ball_jump_3d_game.pdf
    • https://cdn.sqhk.co/nukunudakiju/PYgShcU/women_s_college_basketball_coaches_poll.pdf
    • https://fumitalabojaluk.weebly.com/uploads/1/3/5/3/135399187/1261456.pdf
    • https://cdn.sqhk.co/mugukawi/gchidia/recharge_netflix_using_phonepe.pdf
    • https://monokuzofo.weebly.com/uploads/1/3/2/7/132741222/vikafomabu.pdf
    • https://kowasazupajobex.weebly.com/uploads/1/3/1/3/131383373/rugajuviwosi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/3a1e53e1-a3bf-495c-ac7f-617745842069/bose_wave_radio_remote_control_battery.pdf
    • https://ac402fee-74f4-49a6-b5a4-6a03c6a057de.filesusr.com/ugd/b0cd75_59fbed8b67c0431188f16a66b029b77f.pdf?index=true
    • https://uploads.strikinglycdn.com/files/9900a657-7f64-4ae3-9824-3b15153a43a4/87036010973.pdf
    • http://josilofogi.rf.gd/t_shirt_website_template_free.pdf
    • https://uploads.strikinglycdn.com/files/85b2129c-3f08-4b7b-84f0-e0a5bceff8c3/puwawefid.pdf
    • https://78fa80b2-8629-447b-ad63-53e91e8d4948.filesusr.com/ugd/8f02de_0e8c9b58b040405389ec355641a87c80.pdf?index=true
    • https://uploads.strikinglycdn.com/files/bec60ad4-c2dc-43e0-b2ab-99933675d58f/blues_lead_guitar_licks_tabs.pdf
    • http://kefujaforu.rf.gd/cdfm_exam_study_guide.pdf
    • http://vakalugofiw.rf.gd/2188585084.pdf
    • https://def26600-86c9-4442-a738-094ddf2992d1.filesusr.com/ugd/eb5a6a_6e197676ed6c477e8699032f8ba519eb.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eccd.bin
ec18f9301ac0b16e85ce3a0f437e5db622da9d8ad9cfd15733112da07e1460fa		 pdf-font-stream PDF embedded font (sfnt) at offset 0xECCD 5452 bytes
font_01_sfnt_off0000ff22.bin
ff5a85012c2d49f4e4ee97b27a4c302aa7ac7390fcd27deba0f587a8a57c78b4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFF22 11172 bytes
font_02_sfnt_off00012547.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12547 4324 bytes

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