Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd67751a1e9d551d…

MALICIOUS

PDF

206.2 KB Created: 2021-02-10 13:50:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 06d70c2d361a6a33aa186517ab5c0c01 SHA-1: d70bbce9aba334d9017dfcaa93137744e4a4e459 SHA-256: bd67751a1e9d551d919054c765dbec9a8f0e695f76975282d4a2ee923ef31866
116 Risk Score

Malware Insights

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

The sample is a PDF document flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The 'SE_CALLBACK_LURE' heuristic indicates the document's content is designed to trick users into calling a phone number, a common callback phishing technique. An external URI was also extracted, suggesting potential communication with a malicious server.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9979

Heuristics 5

  • 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://jottigo.ru/123?utm_term=sx+os+6.2 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4471256/normal_6021a273c3611.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415944/normal_601e6df11d4a7.pdfIn PDF document text
    • https://menafemudiwifog.weebly.com/uploads/1/3/0/8/130813668/2752622.pdfIn PDF document text
    • http://rajebamif.22web.org/xunowulinapew.pdfIn PDF document text
    • https://kegegofelev.weebly.com/uploads/1/3/2/6/132681159/172878.pdfIn PDF document text
    • https://sodefabufu.weebly.com/uploads/1/3/4/4/134473286/rotenexaf_fojosabakug.pdfIn PDF document text
    • https://gononazenikemad.weebly.com/uploads/1/3/4/4/134482012/222976.pdfIn PDF document text
    • https://faripolugariwel.weebly.com/uploads/1/3/1/4/131453512/jonuzujojovepizefo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478141/normal_6003de9549fb4.pdfIn PDF document text
    • https://kuvolobogon.weebly.com/uploads/1/3/4/0/134012650/27394.pdfIn PDF document text
    • https://litukepulaj.weebly.com/uploads/1/3/4/8/134863372/4971550.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kozolamo.rf.gd/misplaced_and_dangling_modifiers_exercises_with_answers.pdfIn PDF document text
    • http://dupumimegijema.epizy.com/gasalupanuf.pdfIn PDF document text
    • http://zaxutakizet.epizy.com/rafikoritobasifijapide.pdfIn PDF document text
    • http://vozuxekeve.rf.gd/bupuwesuxadavana.pdfIn PDF document text
    • http://bexalawisilinot.epizy.com/20516527380.pdfIn PDF document text
    • http://migepelulu.epizy.com/97706888996.pdfIn PDF document text
    • http://rujujarorimepa.rf.gd/22522252241.pdfIn 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_off0002efb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EFB4 4828 bytes
SHA-256: 8d0be8be440678c89ab4398d7ba0665a7ecdd09a4819ee2e6c8fbf981c733d87
font_01_sfnt_off00030044.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30044 12916 bytes
SHA-256: 2b5b0090166a890cfba378f9a58622a2befad5ee8fd623775a04a53fa7f458d0

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