Malicious PDF — malware analysis report

Static analysis result for SHA-256 160c01fdc85cf923…

MALICIOUS

PDF

75.2 KB Created: 2021-03-02 08:36:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 9f085e76402323e5730a2d8e40ff655a SHA-1: 381c87585daa32171d64f7031a662b9ad6ad9070 SHA-256: 160c01fdc85cf92316e145ce8b297b376540f8eac37d4f22927dd5d9f834badc
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The sample was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, with at least one pointing to a suspicious domain ('maypoin.ru') and another to a link farm ('medyayazilimtr.com'). The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests the document's purpose is to host a collection of links, likely for phishing or malware delivery, aligning with the 'Spearphishing Attachment' technique. No scripts were extracted, but the presence of numerous external links is the primary indicator of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://maypoin.ru/wix?keyword=ben+10+generator+rex+heroes+united+game PDF link annotation
    • http://medyayazilimtr.com/8453944470vy3p8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4483851/normal_5fcd37f571abc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449984/normal_5fd878a93ce2e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378604/normal_602695cde457c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373782/normal_5fc8a9be4fda0.pdfIn PDF document text
    • https://kadezejuvi.weebly.com/uploads/1/3/4/6/134603763/5547a576.pdfIn PDF document text
    • https://liwavijej.weebly.com/uploads/1/3/4/3/134379327/wepiburaxewenax-tuxojafura-rifeperolimaje-nepuwedekow.pdfIn PDF document text
    • https://kilizilefepik.weebly.com/uploads/1/3/0/7/130775254/7f1239e3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478134/normal_5fc7c8ab9bb8e.pdfIn PDF document text
    • http://wogamilip.iblogger.org/rewofukelisovemi.pdfIn PDF document text
    • http://ig-copyrightnoticehelp.com/86310109040g5hqy.pdfIn PDF document text
    • http://leaninrzpd.site/82809151884mwrz7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380210/normal_6008fcb2dd0a9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bilunijo.epizy.com/beyblade_v_force_gba_english.pdfIn PDF document text
    • https://s3.amazonaws.com/lolaritemukole/excel_spreadsheet_character_limit.pdfIn PDF document text
    • http://nozosikela.rf.gd/59963482949.pdfIn PDF document text
    • https://s3.amazonaws.com/zabejuvijolu/65735377278.pdfIn PDF document text
    • https://s3.amazonaws.com/matogapibelifiv/3370576633.pdfIn PDF document text
    • http://togipumenotu.epizy.com/enrollment_form_template_school.pdfIn PDF document text
    • https://s3.amazonaws.com/fajetufekejo/insulated_concrete_forms_for_sale_oklahoma.pdfIn PDF document text
    • http://rovututuxopi.epizy.com/67462175869.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_off0000e909.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE909 5520 bytes
SHA-256: f8bb18bcb03a333aa33591b42d429fac5b06f837af9bc81aa25658fc3743894e
font_01_sfnt_off0000fbb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBB0 10472 bytes
SHA-256: 3e769314d3a307ae33cb7a026e6c223e7803fc494e2f0f038076c5b52b1c8923

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