Malicious PDF — malware analysis report

Static analysis result for SHA-256 62eb28e3187afed4…

MALICIOUS

PDF

74.6 KB Created: 2021-02-21 19:54:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 012dc992fc93c96d0b72a1308a55e57a SHA-1: 2c5c5ab311ad0b46fbb45faaf10ff503a0eaa1d1 SHA-256: 62eb28e3187afed4d576cd1e30f09331682892cccf2cdc5aac42917991a6e865
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. The heuristic 'PDF_SEO_LINK_FARM' reveals a large number of external PDF links, suggesting a coordinated effort to direct users to potentially harmful content. The presence of embedded URLs further supports the malicious intent of redirecting users to external sites.

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
  • 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.
  • 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://baarspo.ru/123?utm_term=nystrom+atlas+of+united+states+history PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4389353/normal_5fd047be249e8.pdfIn PDF document text
    • https://cdn.sqhk.co/kinibemazoz/gihuDii/14532792673.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470696/normal_5fc58be351733.pdfIn PDF document text
    • https://cdn.sqhk.co/wolebiduju/1jggeje/scrap_copper_price_per_pound_chart.pdfIn PDF document text
    • https://cdn.sqhk.co/jirowolad/jivhekl/44931093128.pdfIn PDF document text
    • https://cdn.sqhk.co/rewakevutel/tiahbzN/syfy_shows_to_watch_on_netflix.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366351/normal_600d8b2917711.pdfIn PDF document text
    • https://cdn.sqhk.co/nujorazaje/RjajdHd/fujuxomin.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448538/normal_5fd7737f9a62d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459027/normal_5fe6b3f87b995.pdfIn PDF document text
    • https://cdn.sqhk.co/pufowuvikij/gf1jdTE/59963897168.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413223/normal_601dbc2475fc1.pdfIn PDF document text
    • https://cdn.sqhk.co/pulununese/Ahd6iby/jojopoxabo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410678/normal_60214bc2ace5c.pdfIn PDF document text
    • https://xuredetinumimo.weebly.com/uploads/1/3/4/6/134630251/f5e7790.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
    • 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_off0000da4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA4B 5100 bytes
SHA-256: 33723eae72ce48565ba16c92f1d29ef5321f5abc15eb8145b50f344ec307cfe6
font_01_sfnt_off0000eb73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB73 10360 bytes
SHA-256: 4a164c938e4a8f52c4d041810eedc535bb0ce70355e2e6404d36f9bfbfc2f06f
font_02_sfnt_off00010ee8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EE8 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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