Malicious PDF — malware analysis report

Static analysis result for SHA-256 751549880f179992…

MALICIOUS

PDF

72.5 KB Created: 2021-02-22 19:40:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 400cf1a14fecd2e07528dbf6babded5d SHA-1: bdabe1b723fbd3102147b584bc8d1e386c578b17 SHA-256: 751549880f17999250f1460eec808c9f853660d0933f72fea76e3d262eb5b209
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains numerous external links, many pointing to suspicious domains, suggesting a link farm or phishing attempt. The 'SE_CALLBACK_LURE' heuristic indicates a potential callback phishing or tech-support scam pattern. While no scripts were explicitly extracted, the ML classifier and ClamAV detection strongly indicate malicious intent, likely involving exploitation or redirection to malicious content.

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 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.
  • 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://bologen.ru/wix?keyword=scott+stamp+catalog+2020+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4450624/normal_60151ea25b43f.pdfIn PDF document text
    • https://redorofi.weebly.com/uploads/1/3/5/3/135383823/gumufuwadigawon.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406464/normal_5fe5992d8e614.pdfIn PDF document text
    • https://kurasapar.weebly.com/uploads/1/3/4/9/134902571/42b46cd5f742b7d.pdfIn PDF document text
    • https://tiwofimobodes.weebly.com/uploads/1/3/4/0/134040820/e3240.pdfIn PDF document text
    • https://tidemipevu.weebly.com/uploads/1/3/0/7/130740592/ribabe.pdfIn PDF document text
    • https://xajaxosu.weebly.com/uploads/1/3/5/3/135304217/df98bd5b7342bd4.pdfIn PDF document text
    • https://dasatupulike.weebly.com/uploads/1/3/4/1/134131314/73be75d2a0b7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479684/normal_6022ceb117497.pdfIn PDF document text
    • https://gevotasi.weebly.com/uploads/1/3/4/3/134389209/bokururaruzoxekezigi.pdfIn PDF document text
    • https://luvodufugatese.weebly.com/uploads/1/3/4/8/134893210/nanivejefi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444875/normal_5ffe0a2a32494.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/pevarijidasalop/everfi_module_5_credit_scores_quiz_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/gomakobez/safesivivolopona.pdfIn PDF document text
    • https://s3.amazonaws.com/tesotiwapax/video_recorder_online_for_pc_free.pdfIn PDF document text
    • https://s3.amazonaws.com/sajatesawodiji/lunejifafugusiwolotiti.pdfIn PDF document text
    • https://s3.amazonaws.com/rorives/lijutimobazabalidumalisu.pdfIn PDF document text
    • https://s3.amazonaws.com/xukanomarexumu/77442284681.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_off0000de19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE19 5756 bytes
SHA-256: c96d8572e32d221599b70f6d821609df18e022929aa7f8f7aa95d4ae6122ee31
font_01_sfnt_off0000f1ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1AC 10184 bytes
SHA-256: 7c283486a348f48335fdf8a1ec19d8744ea9164c4ab5754e31f1d5684f1ab3a0

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