Malicious PDF — malware analysis report

Static analysis result for SHA-256 7611fcef8e11a4a8…

MALICIOUS

PDF

74.9 KB Created: 2020-11-23 19:49:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 6f2ed31be056f37dbcdf8924d1f1e762 SHA-1: d537c9a3d3a839239d353dd5c8fb49188914d11c SHA-256: 7611fcef8e11a4a821cbfeaf1656e3239e58be132d2891851578d92d14706358
214 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, with one specifically identified as a malicious redirector. The document body, though heavily obfuscated, appears to be a lure related to a product manual, suggesting a phishing or malware distribution attempt. The presence of multiple PDF links and a malicious redirector indicates a coordinated effort to drive traffic to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffmen.ru/123?utm_term=walgreens+cool+mist+humidifier+2065+manual In PDF document text
    • https://cdn-cms.f-static.net/uploads/4370780/normal_5fafa0f934efd.pdfIn PDF document text
    • https://gomemetunugup.weebly.com/uploads/1/3/2/7/132712315/7341459.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366306/normal_5f870f28a2334.pdfIn PDF document text
    • https://gunewobeje.weebly.com/uploads/1/3/4/1/134109175/pigupu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465555/normal_5fb9817e63fb6.pdfIn PDF document text
    • https://sutisivanopazar.weebly.com/uploads/1/3/4/3/134310164/rogijozawusukole.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407997/normal_5f9ce58495daa.pdfIn PDF document text
    • https://mufedagejex.weebly.com/uploads/1/3/4/7/134726032/dujulovukopofelig.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/aba6ed84-876d-43c2-a7f1-39468ef33890/95487924436.pdfIn PDF document text
    • https://s3.amazonaws.com/bewibiwat/vabikiw.pdfIn PDF document text
    • https://s3.amazonaws.com/potofaw/sarirunimomi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/80fba959-b3a6-4fb3-82d1-bce44c7846bb/fuwokibosutipesepope.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc57d5f3-2282-4026-8287-7b6f54186e1e/xopasuti.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_off0000e4c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4C4 6000 bytes
SHA-256: 5e3867c7c72d425093a53fb18b8bf79c78eebfcd5520d193a587e8ff0b3a3779
font_01_sfnt_off0000f916.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF916 10976 bytes
SHA-256: d3dd40ee1be7e5532dd643d35d04ecf36ab81eba8e43ecbf64d9af689ffde9b3

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