Malicious PDF — malware analysis report

Static analysis result for SHA-256 359ce31b0fe4a36c…

MALICIOUS

PDF

98.4 KB Created: 2021-04-21 01:01:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: e6638ae4fc249122a835a13c4e953234 SHA-1: de88457cc8e553e2cd3cb39e55ea205d4d15e4a1 SHA-256: 359ce31b0fe4a36c8e3cac1377b9c6ca0311d55028954dfeab993ab3886e4d54
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many pointing to disposable hosting services, indicative of a link farm or phishing operation. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a malicious document designed to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://pelibifir.ru/strik?utm_term=how+to+write+good+essays+for+college+application PDF link annotation
    • https://cdn.sqhk.co/letarezetap/jjgcjiX/bluestacks_hd_app_player.pdfIn PDF document text
    • https://cdn.sqhk.co/zisujidixa/gighfif/89033910081.pdfIn PDF document text
    • https://dipitamadupod.weebly.com/uploads/1/3/4/8/134882687/6970465b.pdfIn PDF document text
    • http://ketrovk.xyz/326623903441bq39.pdfIn PDF document text
    • https://xovarexo.weebly.com/uploads/1/3/4/8/134895284/9427962.pdfIn PDF document text
    • https://cdn.sqhk.co/bujasugawo/jTIB9hh/mexavolowetaxu.pdfIn PDF document text
    • https://depagolal.weebly.com/uploads/1/3/0/8/130813973/7480755.pdfIn PDF document text
    • https://s3.amazonaws.com/wiwuxot/20066927299.pdfIn PDF document text
    • https://s3.amazonaws.com/sowewazulejewi/najuwofomujup.pdfIn PDF document text
    • https://vetolotex.weebly.com/uploads/1/3/1/3/131379132/1776095.pdfIn PDF document text
    • http://kukushpa.fun/working_iptv_stalker_mac_addresscocwi.pdfIn PDF document text
    • http://megahit.space/arches_national_park_guide29656.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxexi/assembler_system_programming.pdfIn PDF document text
    • http://busforpay.online/35076529637ma7vv.pdfIn PDF document text
    • https://cdn.sqhk.co/javeduner/gghvz2A/52258410636.pdfIn PDF document text
    • https://cdn.sqhk.co/subesanodag/8TheBMw/small_led_flashlight_keychain.pdfIn PDF document text
    • http://usesol.xyz/kuboroburojurogabaju8lwcs.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://soreras.epizy.com/the_city_and_the_city_book_ending.pdfIn PDF document text
    • http://fuzazoxavuvuw.rf.gd/australian_universities_list.pdfIn PDF document text
    • http://suzisovizereri.epizy.com/81331828149.pdfIn PDF document text
    • http://nujufotesu.epizy.com/gopezaxapexokozos.pdfIn PDF document text
    • http://pigepitusedotet.rf.gd/3671559354.pdfIn PDF document text
    • http://roxonolabixatox.epizy.com/fiwimujebitorotinuge.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_off00014431.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14431 5476 bytes
SHA-256: 93f1664cf50393bbb34c7b7c63ce6bb1c9aba79cd762ba48133bde1e5d1f07c0
font_01_sfnt_off000156fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x156FE 10720 bytes
SHA-256: 04dca6eaf13d97fc5e72159bffa97e573be56c62a8881206b35dbf955f614363