Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba2a693da2f1ef7a…

MALICIOUS

PDF

76.8 KB Created: 2021-01-16 01:12:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: c3634e69e27e22795faf8aa4681b9fa1 SHA-1: eb8a38fd9b5bea2c5a2648a38ce027decae47812 SHA-256: ba2a693da2f1ef7acce03418ec4cfc027681716475a8e14d3e47b28035a8fa33
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, with one specifically identified as a potential phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it is designed to redirect users to malicious sites, likely for credential harvesting or further malware delivery.

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
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://trafffe.ru/123?utm_term=the+witch%2527s+daughter+summary PDF link annotation
    • https://cdn.sqhk.co/vamunidibu/JghhamX/fight_back_up_meaning.pdfIn PDF document text
    • https://site-1168267.mozfiles.com/files/1168267/bolomo.pdfIn PDF document text
    • https://site-1166728.mozfiles.com/files/1166728/vogetisela.pdfIn PDF document text
    • https://site-1194646.mozfiles.com/files/1194646/jumpcloud_agent_not_reporting.pdfIn PDF document text
    • https://wurikosaradusif.weebly.com/uploads/1/3/1/3/131384544/ceaf0127784.pdfIn PDF document text
    • https://site-1245213.mozfiles.com/files/1245213/70822062895.pdfIn PDF document text
    • https://jevefelenop.weebly.com/uploads/1/3/0/7/130775498/c9ce52cb098def7.pdfIn PDF document text
    • https://site-1168059.mozfiles.com/files/1168059/voxisesoralesewutototo.pdfIn PDF document text
    • https://site-1176165.mozfiles.com/files/1176165/student_beans_gymshark_rabatt.pdfIn PDF document text
    • https://site-1178304.mozfiles.com/files/1178304/nonilemal.pdfIn PDF document text
    • https://cdn.sqhk.co/getabemuto/GjjjZ8Y/electrician_pre_apprenticeship_melbourne_polytechnic.pdfIn PDF document text
    • https://site-1177340.mozfiles.com/files/1177340/tezuvuxoxuxalixefuwotu.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/potofaw/facebook_cover_template_size_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/tosevud/99591539268.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_off0000ef83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF83 5496 bytes
SHA-256: 0361f945ea6e0752a9a35de1a6a2318e19c3ce1ed93ff26f72334036e20aba11
font_01_sfnt_off00010229.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10229 10520 bytes
SHA-256: 9f4b7a257f2bfc27c8e49013a5b3ece37cff22626e5f6aa49bb07b2ad644acf0

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