Malicious PDF — malware analysis report

Static analysis result for SHA-256 9abdfc0050501a0d…

MALICIOUS

PDF

66.9 KB Created: 2021-03-01 17:01:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 052a4100bde869cf5d82310f2071f45e SHA-1: 7634f6ba6e2aa2605620254344198d430f948456 SHA-256: 9abdfc0050501a0dc10bb5d1e65579c7f6367970b0f949508f1e2ef26314e467
146 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. The document body and heuristics suggest a callback phishing lure, prompting users to call a phone number for fake security or billing issues. While no scripts were explicitly extracted, the presence of numerous external URIs and the nature of the heuristics point towards a malicious intent to deceive the user.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://leonvi.ru/aws?utm_term=cateye+cycle+computers+for+sale PDF link annotation
    • https://cdn.sqhk.co/tefulobesa/hidhbYQ/paypal_credit_security_phone_number.pdfIn PDF document text
    • http://wumomotetidofe.getenjoyment.net/daxonajaburaludevumukonez.pdfIn PDF document text
    • https://cdn.sqhk.co/rogevuzazi/jjifhck/36087328416.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410030/normal_5fe3b19b1a6d6.pdfIn PDF document text
    • http://kolagozisil.mywebcommunity.org/how_much_foreign_aid_does_australia_give_china.pdfIn PDF document text
    • http://kitafoged.medianewsonline.com/75413537946.pdfIn PDF document text
    • http://barbanapoli.moscow/wireless_gsm_sms_home_burglar_security_alarm_system_manualpuqji.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404725/normal_60237fa2de698.pdfIn PDF document text
    • http://lamovingcompany.com/the_three_body_problem_free_download09nyt.pdfIn PDF document text
    • https://cdn.sqhk.co/vinogusi/7pibha7/rojenenozef.pdfIn PDF document text
    • http://pagebake.com/garmin_keygenerator_1.5_chomikujgcodm.pdfIn PDF document text
    • https://cdn.sqhk.co/rukeditele/fAjhjdr/mba_international_business_salary_in_canada.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410986/normal_600c1c7e4199e.pdfIn PDF document text
    • http://storeeu.info/factory_inc_for_pcjk93i.pdfIn PDF document text
    • http://bometaximom.scienceontheweb.net/63489857409.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414515/normal_5ffe87c86a864.pdfIn PDF document text
    • http://bidizujimon.getenjoyment.net/42330636278.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c8bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8BD 5168 bytes
SHA-256: bdf355013a512c609cae894fac380c16d25327e5a856ccbab8c9fe37e20238f6
font_01_sfnt_off0000da43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA43 10604 bytes
SHA-256: d76e9a6973f4e7a08bdcd344974ac217f253be6549bcf05eff00b35d07242772

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