Malicious PDF — malware analysis report

Static analysis result for SHA-256 5bc229640f97e671…

MALICIOUS

PDF

76.4 KB Created: 2021-03-17 17:38:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 62486b795e8c7bf138762d9a455e3c1e SHA-1: 52bb6f6c34683c5ae211ff4e48949e88d8e87706 SHA-256: 5bc229640f97e6717b1b61de421dde6f21120148d5b4132a74d316a6ab8f6288
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO spamming operation. One of the extracted URLs, 'https://seumenha.ru/wix?keyword=worms+2+apk+obb', indicates a potential lure related to game downloads, which is a common tactic for malware distribution. The PDF structure and embedded content are consistent with phishing or malware delivery attempts.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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 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://seumenha.ru/wix?keyword=worms+2+apk+obb PDF link annotation
    • https://cdn.sqhk.co/gofuzurafano/jjhijfL/best_performance_pickup_truck_philippines.pdfIn PDF document text
    • https://tutowori.weebly.com/uploads/1/3/5/3/135317166/kepupijuvojezus.pdfIn PDF document text
    • http://vivekawiga.sportsontheweb.net/vuwiwozufadogawonu.pdfIn PDF document text
    • https://koborabi.weebly.com/uploads/1/3/0/7/130775888/5992180.pdfIn PDF document text
    • http://probnik1313.tech/54833087045kcrlz.pdfIn PDF document text
    • http://capridigi.com/is_super_kirby_clash_freeh84rb.pdfIn PDF document text
    • https://terifurarogo.weebly.com/uploads/1/3/4/3/134317228/potakixaxiwixa-lojibuw-dasafi-sofapiwus.pdfIn PDF document text
    • https://cdn.sqhk.co/tivinarafuvu/RnZfhcz/fast_news_app_iphone.pdfIn PDF document text
    • http://kanshoper.site/brussels_midi_tourist_informationfr5q4.pdfIn PDF document text
    • https://movabeze.weebly.com/uploads/1/3/0/8/130814110/7472026.pdfIn PDF document text
    • https://cdn.sqhk.co/xutazazo/pFmigLz/28225108955.pdfIn PDF document text
    • https://zemedabumudog.weebly.com/uploads/1/3/2/7/132712209/429d239a8e5.pdfIn PDF document text
    • http://realnoe-obshenie.online/backup_photos_to_google_drive_androidnjfsu.pdfIn PDF document text
    • http://tortomsk.ru/szckte_yap_km_sorularvwlrm.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://b9ecad59-ee1c-469f-8402-ddbad3bf215f.filesusr.com/ugd/84dab8_8a6a9009610245a4bbf2ded5a46a1d8e.pdf?index=trueIn PDF document text
    • https://c370dac7-4848-4fa0-a6df-94361299e8ba.filesusr.com/ugd/fa6303_8ee92033797e4dc0b15a50fb273ea237.pdf?index=trueIn PDF document text
    • https://fed4949e-3809-4fc0-a28b-84c5d390f589.filesusr.com/ugd/94482e_c5d47cff60574b3c9156a6a9fb2a58ce.pdf?index=trueIn PDF document text
    • http://dexadusoxeb.atwebpages.com/wordly_wise_3000_book_5_lesson_13.pdfIn PDF document text
    • http://mekofirudusem.rf.gd/2127700989.pdfIn PDF document text
    • http://wumafopid.onlinewebshop.net/brave_new_world_themes.pdfIn PDF document text
    • http://lojabupabavize.onlinewebshop.net/manukefinutux.pdfIn PDF document text
    • http://dolifusekaxug.epizy.com/what_does_a_janome_quilting_foot_look_like.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_off0000ea8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA8E 5284 bytes
SHA-256: 49fcc22658ffce7e68fc325939c3ad180b60cae1cdcd26d71801f8ec9e4da629
font_01_sfnt_off0000fc78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC78 11728 bytes
SHA-256: 503fca2b84e49d213ae9aa23cefe18354b008082ac0213d4ec9c08739d364826