Malicious PDF — malware analysis report

Static analysis result for SHA-256 35e95eba3715f982…

MALICIOUS

PDF

70.9 KB Created: 2021-03-10 05:45:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 26787cf11eae71ee050e22574e5ece4f SHA-1: 3f9dc7b5577cfef874c71a0cffa52c55d6850814 SHA-256: 35e95eba3715f98296d82d400dc879b08bcb2d42c3b21d27f19a35cf295ad8d0
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to disposable domains and link farms, a common tactic for SEO spam or phishing. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://midufefew.ru/wix?keyword=star+jewelry+canton+mi PDF link annotation
    • https://vokefepafox.weebly.com/uploads/1/3/4/3/134333292/1a6f6eacbe.pdfIn PDF document text
    • https://puliwive.weebly.com/uploads/1/3/4/6/134660228/lonatovene.pdfIn PDF document text
    • https://fupakukenig.weebly.com/uploads/1/3/4/2/134234610/magubefula_vekipamevetem_rakesenadawo.pdfIn PDF document text
    • http://filanion.online/grant_writing_for_dummies_free_downloadnt1w0.pdfIn PDF document text
    • http://trujillostacoshop.com/the_soul_collector_2019_ending_explained0aj4h.pdfIn PDF document text
    • https://miwevedadig.weebly.com/uploads/1/3/1/4/131437981/3571043.pdfIn PDF document text
    • https://cdn.sqhk.co/mevazasid/jg7iNX9/ripitalibenavoxarupofe.pdfIn PDF document text
    • http://usersdeviceprotectionservice.site/22240980694bqg3b.pdfIn PDF document text
    • https://cdn.sqhk.co/bozadukopufu/giibzge/infected_tattoo_healed.pdfIn PDF document text
    • http://haifaiv.ru/zonafogilozilojawezomuwx8p.pdfIn PDF document text
    • http://akfb.online/bhojpuri_movie_hd_pictureh4w3i.pdfIn PDF document text
    • https://repotadidutu.weebly.com/uploads/1/3/4/3/134310826/xuravewupe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/farowug/12620933772.pdfIn PDF document text
    • http://kakasis.onlinewebshop.net/57757728967.pdfIn PDF document text
    • http://xakagigoneliv.myartsonline.com/words_their_way_primary_spelling_inventory_scoring_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/sivanira/44601451949.pdfIn PDF document text
    • https://s3.amazonaws.com/bejexe/constructing_a_human_pedigree_worksheet_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/najubu/hunter_hayes_invisible_free.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_off0000da47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA47 5140 bytes
SHA-256: 2e3b9a8672ef598720bc4a2c1060cbddc04634f36ac52cecbe097896f9a97fca
font_01_sfnt_off0000ebc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBC9 10212 bytes
SHA-256: 91ae73b24fd33178f7360ae9244fd60b9cb81c33032ea320d5ce3024f3f8e74b

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