Malicious PDF — malware analysis report

Static analysis result for SHA-256 837871bc2c4c466a…

MALICIOUS

PDF

76.2 KB Created: 2020-12-27 08:58:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: f9485f7a7fb49d92162d1a5c39fba7c9 SHA-1: 721be6abb62f60acfacd03e3ddd18254294792ad SHA-256: 837871bc2c4c466a118a41141cf42f7c03bde5bd1563c532bf1bea4bf13b90a1
214 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, with at least one identified as a malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. The document body, though heavily obfuscated, suggests a lure related to CV templates, aligning with phishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://gettraff.ru/aws?utm_term=cv+template+for+interior+designers In PDF document text
    • https://cdn.sqhk.co/rubekafux/bkYgfhc/30962322294.pdfIn PDF document text
    • https://mavezuwunokil.weebly.com/uploads/1/3/4/6/134627141/labalepi-wofidu-kijedisatu-pexisitajozagub.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384301/normal_5f8fa9348b107.pdfIn PDF document text
    • https://cdn.sqhk.co/febenanedibu/bjcihy2/tobunofapajomiro.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/897d7e52-1386-46cf-9505-fb08c43326f3/how_to_draw_cartoon_faces_step_by_step.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7494794c-5de3-4314-9502-a01482c695e6/favefuduxivunuxewaj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/03d6b1cc-eec9-4c60-89f5-8989d736b713/rofezudo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7b52648-55d6-4512-b202-8669c4bd75f1/38228239182.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/72074e54-7baf-42dc-ba79-20faf50919bd/mule_boston_dynamics.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d21d5d65-67d8-42d9-b25d-366c0185ba69/rojamavumetino.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/998b4c52-78a0-4745-bd41-8b9edcd32e1a/historical_models_of_teacher_evaluation.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_off0000ee0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE0E 5324 bytes
SHA-256: 5b8ef348c88237b3fac310e3fa04d8ffeb92a029f6b19098dd41596bd0bc2213
font_01_sfnt_off0001001a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1001A 10588 bytes
SHA-256: 541060543b8f2fafe7ca4ff4ee5ea503e4e15e6faf515e3bc9c891f3ba784f01

Open this report in the interactive analyzer, or submit your own file for analysis.