Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b3e671aad7beecc…

MALICIOUS

PDF

70.9 KB Created: 2020-11-19 03:27:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 4c54143b8807de5f849853821cb4ea40 SHA-1: ad1c7ade5e424e31628409c0f655ddb1da8f3d48 SHA-256: 3b3e671aad7beeccc4aa558f809a60b095e0d8c556a980e0bf8bfd604990cdb3
214 Risk Score

Malware Insights

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

The PDF file contains multiple embedded links, with one specifically pointing to a known malicious redirector. The heuristic firings indicate it's a malicious redirector and part of a link farm, suggesting a phishing or scam attempt. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of an attempt to lead the user to malicious content, likely for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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.
  • 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.
  • 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://cctraff.ru/123?utm_term=hp+15-f272wm+reviews In PDF document text
    • https://puzaloraren.weebly.com/uploads/1/3/4/5/134510283/donumexatizoze.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408587/normal_5fb5c9d26d3cd.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/libeganot/anjaniputra_movie_mp4.pdfIn PDF document text
    • https://s3.amazonaws.com/negonanopix/world_of_tanks_blitz_hack_no_survey.pdfIn PDF document text
    • https://s3.amazonaws.com/lanubili/25013035406.pdfIn PDF document text
    • https://s3.amazonaws.com/lejivugeleguwod/zumavivivusexaj.pdfIn PDF document text
    • https://s3.amazonaws.com/bopuxosavubare/zotirumekumajurenotufu.pdfIn PDF document text
    • https://s3.amazonaws.com/rokuwapesu/edtpa_task_1_commentary.pdfIn PDF document text
    • https://s3.amazonaws.com/peveziwoguxuzam/anemia_resumo.pdfIn PDF document text
    • https://s3.amazonaws.com/bodajaku/contract_template_google_docs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e0423e7-fe24-4e74-9c6a-82c349ef3b1e/nopiwuwakajimigekapu.pdfIn PDF document text
    • https://s3.amazonaws.com/piwanisaj/48962898593.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_off0000d54e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD54E 5340 bytes
SHA-256: e523f9f9cea943886219e13f17c8799f5cbb2b15c0febe8425a43b97229e5697
font_01_sfnt_off0000e79a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE79A 11176 bytes
SHA-256: 6308edec380db1c4257f76d90a0e6b8f0213cda6f5c857d648a6d11c5871b380

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