Malicious PDF — malware analysis report

Static analysis result for SHA-256 27b0bcf3947f9fa9…

MALICIOUS

PDF

78.8 KB Created: 2021-03-24 05:21:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: d827af80d5f9d1c5d7d26d7c7377085c SHA-1: d71c7bf3a3446bd8e80c8d7a61c4f7d5879bff6f SHA-256: 27b0bcf3947f9fa96fff4675b4d91d65a63c12c0aa3e3a4ebc360ad46dbd8de4
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a significant number pointing to disposable hosting, indicating a link farm or SEO spamming operation. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were directly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://jacksth.ru/wix?keyword=geometry+proofs+homework+answers PDF link annotation
    • http://kakorixow.mygamesonline.org/christmas_carol_fake_book.pdfIn PDF document text
    • https://s3.amazonaws.com/satudifin/didej.pdfIn PDF document text
    • https://cdn.sqhk.co/tenalewi/iHDiffU/project_management_techniques_ppt.pdfIn PDF document text
    • https://cdn.sqhk.co/gidenateg/yidgcmI/fios_tv_guide_virginia_beach.pdfIn PDF document text
    • https://cdn.sqhk.co/jemajujo/WXCWHnq/76227417211.pdfIn PDF document text
    • https://cdn.sqhk.co/laruxibut/hnjehco/frosty_boy_ice_cream_menu.pdfIn PDF document text
    • https://safamitiwifiro.weebly.com/uploads/1/3/0/7/130739579/tudukiwoxiwozupop.pdfIn PDF document text
    • https://cdn.sqhk.co/fegujajox/gg9ieqM/zulomojovugujamagiputo.pdfIn PDF document text
    • https://koramuxojenaxer.weebly.com/uploads/1/3/4/7/134701110/linixujiruxuj.pdfIn PDF document text
    • https://vifojozajo.weebly.com/uploads/1/3/1/4/131454549/nadepokudaponu.pdfIn PDF document text
    • https://cdn.sqhk.co/kojetovukufo/fnKojdQ/98366802976.pdfIn PDF document text
    • https://cdn.sqhk.co/xadowififux/hidxalY/mx_player_android_tv_box.pdfIn PDF document text
    • http://nupewijanetari.medianewsonline.com/matlab_free_download_for_mac_os_x.pdfIn PDF document text
    • http://zugugalepew.mypressonline.com/how_much_is_the_tesla_model_3_performance.pdfIn PDF document text
    • https://s3.amazonaws.com/jobavo/vodirolidovakowa.pdfIn PDF document text
    • https://rejosunofefi.weebly.com/uploads/1/3/0/8/130874376/losujoxotikumejomeva.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lefumes.rf.gd/fadebaka.pdfIn PDF document text
    • http://napubuxuwel.epizy.com/balance_3d_game_for_pc.pdfIn PDF document text
    • http://tutedenomazul.epizy.com/34595325469.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

Related samples 4

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f468.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF468 5400 bytes
SHA-256: a70cb317b12a10cb14a3496e9b4f76355ca3aff3e47565817dfa2d2de18bce28
font_01_sfnt_off000106b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106B6 11516 bytes
SHA-256: 55dc379c788bda0a1907144596bc6176a2e8a77e1939336931af09c4dfc1d7b6

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