Malicious PDF — malware analysis report

Static analysis result for SHA-256 7232cb3acb1177b8…

MALICIOUS

PDF

77.4 KB Created: 2020-11-24 13:27:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: a649bc0c339b1a0a07b007604c27d097 SHA-1: eaf935002a71a5d405edb45f667ead1994af586d SHA-256: 7232cb3acb1177b8814fa34ebbf727d432f8216260f228667b37acc1668f5df6
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://traffmen.ru/strik?utm_term=partes+de+una+iglesia+evangelica'. This indicates the document's primary purpose is to lure the user to a potentially harmful website. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the embedded URL is a high-priority indicator of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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 links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://traffmen.ru/strik?utm_term=partes+de+una+iglesia+evangelica In PDF document text
    • https://cdn-cms.f-static.net/uploads/4372378/normal_5f8f2df9ec450.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460682/normal_5fabb89667589.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369773/normal_5fa2955544d05.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388177/normal_5f959fd637428.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382405/normal_5f9069f8ddbba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383703/normal_5fa697e56a82e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/bf99a0fc-5710-4fda-8167-f33b654b4b24/pupipogevavibife.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae68437d-d83f-485c-b170-16075ac4a19d/dobiwa.pdfIn PDF document text
    • https://s3.amazonaws.com/joterige/hostelworld_barcelona_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/530cb254-7f54-4a12-8b59-0cc05c265474/xumujexuzeparimezaminib.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ecf26b1-780f-47d5-a60e-1a58056f6f1e/nanjing_swansoft_cnc_simulator.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e62bb7d-e779-4316-9766-21dc6e6d9752/nba_live_hack_apk_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ff37494-77b1-446e-9e87-979b7b32a7db/45855770104.pdfIn PDF document text
    • https://s3.amazonaws.com/jazuravazaguz/sexixejejifabodenavekimik.pdfIn PDF document text
    • https://s3.amazonaws.com/nakuzafol/al_quran_indonesia_offline_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7b7210d-7c49-49c1-b5bc-4a4d7decc2d7/mexajufota.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e4dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4DD 4940 bytes
SHA-256: 3906040408ed91986eeff056e5be6956af9cdf314cad03b86193fbc79eb8a6cd
font_01_sfnt_off0000f5ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5AD 10784 bytes
SHA-256: b5ae241497c8ace71458f9b23a73d9c1f1f9e173a5b10815033ebb0a181025f5
font_02_sfnt_off000118d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118D9 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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