Malicious PDF — malware analysis report

Static analysis result for SHA-256 529bc7bdda94ab67…

MALICIOUS

PDF

75.9 KB Created: 2021-05-08 01:29:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: aaf733fdc321a949c8a9d5f0582256ee SHA-1: 0a25467ef4939b28f31d2b023e8ec1a9c6859616 SHA-256: 529bc7bdda94ab67e04245251692de722861e612a6968473ba9018476e5ac648
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to potentially harmful content. The document body, though heavily obfuscated, appears to be a lure related to technical diagrams, which is a common tactic for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://seumenha.ru/strik?utm_term=2005+polaris+ranger+500+wiring+diagram PDF link annotation
    • https://cdn.sqhk.co/xonudutixova/f8zpC0x/facebook_search_by_phone_number_2019.pdfIn PDF document text
    • https://gexaxiwiwa.weebly.com/uploads/1/3/4/4/134480231/8a07b495cbf677.pdfIn PDF document text
    • http://kunutudusoxa.mywebcommunity.org/dipenip.pdfIn PDF document text
    • http://hookup666.site/ligafikimepuxakupakeraj9ai7c.pdfIn PDF document text
    • http://classkaod.ru/simple_notepad_camera5fl7y.pdfIn PDF document text
    • http://romeita.fun/guess_the_movie_quiz_answers_level_9yju7m.pdfIn PDF document text
    • http://lozhobelir.space/55818519287mwj9b.pdfIn PDF document text
    • https://cdn.sqhk.co/jimevexir/Qja6jht/word_search_pro_answers_former_british_colonies.pdfIn PDF document text
    • https://cdn.sqhk.co/vulasobifow/13ghght/cercle_de_la_forme_tolbiac_paris.pdfIn PDF document text
    • https://retibome.weebly.com/uploads/1/3/4/6/134680472/1540526.pdfIn PDF document text
    • https://cdn.sqhk.co/kamepixuxuk/is8wji4/dilitixixisugefozo.pdfIn PDF document text
    • https://labivorimafixal.weebly.com/uploads/1/3/4/8/134886738/wupudilepu_najumefu_lewedu_lugenadogajape.pdfIn PDF document text
    • https://cdn.sqhk.co/pofoxubo/hbhbM9S/bsnl_new_vasantham_plan_recharge_offers.pdfIn PDF document text
    • https://cdn.sqhk.co/numiwuzuwix/gejanih/ap_world_history_modern_time_periods.pdfIn PDF document text
    • https://cdn.sqhk.co/zapimafe/jahegjg/57874273237.pdfIn PDF document text
    • https://jevokave.weebly.com/uploads/1/3/4/2/134266272/fbd04f5e61533ec.pdfIn PDF document text
    • https://cdn.sqhk.co/dofulokune/0xxhdjd/61360134855.pdfIn PDF document text
    • http://kupiokno.su/harry_potter_storyteller_ornaments_2020hdqjr.pdfIn PDF document text
    • https://nulebuset.weebly.com/uploads/1/3/1/4/131411431/8053c.pdfIn PDF document text
    • https://cdn.sqhk.co/jifibipex/fhgsaic/hexa_block_puzzle_online.pdfIn PDF document text
    • http://dujojiwasemob.mywebcommunity.org/12_math_rules_that_expire_in_the_middle_grades.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a5f79bb-1649-4a64-87ac-e3df8bdfe4cf/zuzisuweb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7cfd380c-cb93-4dbb-89d0-cde305638d7d/siguxonakagem.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec27e65c-766c-495a-982b-30f837ee3dc4/how_to_remember_to_be_mindful.pdfIn PDF document text
    • http://vuxepogi.atwebpages.com/autocad_tutorial_architecture.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_off0000ec7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC7A 5672 bytes
SHA-256: be6cdd75484f1f2be516094533df65cedbfc651d73945b32052d99b00f398a2f
font_01_sfnt_off0000ffc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFC2 10040 bytes
SHA-256: ef98a249c8b17d16f68648447d9df2fb687157d9bce09a3506249a3ebf3d4e7e