Malicious PDF — malware analysis report

Static analysis result for SHA-256 84411eddffe793cd…

MALICIOUS

PDF

73.3 KB Created: 2020-11-18 07:58:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: d1ba8eda05470daf96c52dbbf8e010c4 SHA-1: c26d888ed7985722f38ceaf8cafab558f8926e8b SHA-256: 84411eddffe793cdc71ee0e030550321e0752700f108a73168a0171c2b9dab83
214 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to malicious infrastructure, specifically identified as a redirector. The document body, though heavily obfuscated, contains text related to 'Roblox song id for bad guy', suggesting a lure to attract users. The presence of multiple external PDF links and a critical heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK indicates a phishing or malware distribution attempt.

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=roblox+song+id+for+bad+guy In PDF document text
    • https://cdn-cms.f-static.net/uploads/4447433/normal_5fa6e6521f2ab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417658/normal_5f9b9039d0020.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365555/normal_5f8c2525c6572.pdfIn PDF document text
    • https://rimesozarabef.weebly.com/uploads/1/3/1/6/131607712/8407166.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414852/normal_5fa224b6705fb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502178/normal_5fad74c14af3b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479435/normal_5fad5919ea228.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381543/normal_5fa467825b5d4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370302/normal_5f88c3ee5ee57.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/xutomoxu/tebepaluwul.pdfIn PDF document text
    • https://s3.amazonaws.com/xezonijida/pefarizuwegadutubo.pdfIn PDF document text
    • https://s3.amazonaws.com/temujonuwu/free_converter_online_to_powerpoint.pdfIn PDF document text
    • https://s3.amazonaws.com/bopuxosavubare/1_cup_blueberries_nutritional_information.pdfIn PDF document text
    • https://s3.amazonaws.com/vukumesoj/sogolowelolil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a5be6bf-dbec-4245-ae2f-b5afc1364b2a/pathfinder_kingmaker_best_feats_for_wizard.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e583c96a-06c3-4d01-86e1-e3b44767d134/danaketijejamete.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_off0000dcd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCD0 5392 bytes
SHA-256: 16d38ac3ceddc420d3e6f32311cfcf18d5c63ea084096dc55e8e34bbe1f53704
font_01_sfnt_off0000ef43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF43 12340 bytes
SHA-256: 5473d994d7422643bccab6f2501ffd92a58793af4096fa6a68a4f67bcf1fbd0e

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