Malicious PDF — malware analysis report

Static analysis result for SHA-256 f162908dee436678…

MALICIOUS

PDF

75.3 KB Created: 2021-03-19 05:33:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 191ac2620ee4a620bfd915030747b66f SHA-1: 92f7e9677d592362260ae11961c1bee010954203 SHA-256: f162908dee436678e2f9ad444df6a4a92692cf24af836d8aabfa36e21a2bb311
126 Risk Score

Malware Insights

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

The PDF contains numerous external links, with a heuristic identifying it as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to potentially malicious sites, likely as part of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • 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 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=santa+lucia+mountains+slender+salamander PDF link annotation
    • http://wssummer.space/cut_you_off_song_lyricstr94f.pdfIn PDF document text
    • https://cdn.sqhk.co/papazokixe/9jaKgiS/monster_truck_games_online_for_pc.pdfIn PDF document text
    • https://cdn.sqhk.co/zijopenuxafi/gACTfLB/bandicam_watermark_remover.pdfIn PDF document text
    • https://cdn.sqhk.co/zewuxumaro/bjghhgd/bootstrap_form_modal_template.pdfIn PDF document text
    • https://cdn.sqhk.co/niserutom/Pii8uig/86391013306.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487622/normal_600ce027ebde8.pdfIn PDF document text
    • https://cdn.sqhk.co/jerivudofin/dihhhnL/663905024.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469828/normal_604736751ff8b.pdfIn PDF document text
    • http://buzevuzelape.mywebcommunity.org/frigidaire_refrigerator_fgus2632le0_parts_list.pdfIn PDF document text
    • http://e-devletodeme.net/76493323731wy4hy.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404124/normal_601cdc2c25a87.pdfIn PDF document text
    • https://cdn.sqhk.co/dadirowuj/fgeCjhW/72573690568.pdfIn PDF document text
    • https://cdn.sqhk.co/mipijotom/cYjijij/notification_sounds_iphone_xr.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459318/normal_5fca7ad06dad8.pdfIn PDF document text
    • http://jotafitosixa.getenjoyment.net/le_canard_enchain_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/wirujurumugi/azGjUgi/domino_offline_mod.pdfIn PDF document text
    • https://cdn.sqhk.co/xonipavu/IVqhijc/37537338037.pdfIn PDF document text
    • https://cdn.sqhk.co/sixepatexup/3Ehfjna/runodewaguvasiko.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461497/normal_601d2d5fed26d.pdfIn PDF document text
    • http://rikafitamedad.medianewsonline.com/sufopefowipunixukipewe.pdfIn PDF document text
    • http://gexomafe.mypressonline.com/oscar_award_2020_download.pdfIn PDF document text
    • https://cdn.sqhk.co/vabalogu/qicKjbx/53277050640.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://feferabi.atwebpages.com/2572074445.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_off0000e7ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7CE 5188 bytes
SHA-256: 5c7a199c8b806c7ea5f88fe78f987db57b600b81f0ef7c62f6b011327604c5ae
font_01_sfnt_off0000f953.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF953 11328 bytes
SHA-256: a60522bcbba87bee49683ba042ac9b6977986a734157d8f8e8d69d5a32c5b35b

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