Malicious PDF — malware analysis report

Static analysis result for SHA-256 68b86e6d3263b0df…

MALICIOUS

PDF

81.3 KB Created: 2021-03-24 19:33:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: f7054dfb4c862e642f9eba248dd80440 SHA-1: 9e37b046e4ef70c0ccc8bddaea469b8ad2ef94c2 SHA-256: 68b86e6d3263b0df4c49789b6e01e06655726db78c38ac5ec0a8a70657133ee4
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://zajinet.ru/wix?keyword=zybez+price+guide+2007scape PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4367667/normal_5fd2efc01883c.pdfIn PDF document text
    • https://cdn.sqhk.co/xedufoga/fEkrWib/xunagutobajuguxoze.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407327/normal_6001a01050e95.pdfIn PDF document text
    • http://akb54.ru/vezexuvemematax0w.pdfIn PDF document text
    • http://nonoxutiwi.mypressonline.com/bacterial_growth_phase.pdfIn PDF document text
    • http://italy50wow.pro/kigixifobadirokabimo2k3hb.pdfIn PDF document text
    • https://cdn.sqhk.co/berazanoga/jaHbuhf/estilo_de_vida_saludable_frases.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460070/normal_5fcef8475243d.pdfIn PDF document text
    • https://cdn.sqhk.co/matajikiwov/jjq4gcf/racewood_horse_jumping_simulator.pdfIn PDF document text
    • https://cdn.sqhk.co/lokijuzim/gcwiDic/carnival_street_food_chef_s_table.pdfIn PDF document text
    • https://cdn.sqhk.co/salosegebomi/hOsq7sL/pawafazutot.pdfIn PDF document text
    • http://autocredit.moscow/17_day_diet_book_meal_plan54r7n.pdfIn PDF document text
    • http://tanemazijafawin.medianewsonline.com/mitak.pdfIn PDF document text
    • http://feldhaus-klinker-plitka.ru/used_nikon_sb_800_speedlight_flashw5108.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/7ffa4b44-2118-48d7-9693-d0e23e13422d/what_does_60_years_represent.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ada30f26-7f17-48c9-9ea7-02d358e9d22c/96708990537.pdfIn PDF document text
    • http://taberadajip.atwebpages.com/28281703677.pdfIn PDF document text
    • https://4eff3ec4-d147-45d1-be73-876d9e1d0019.filesusr.com/ugd/efb3f0_b2d9daa83a8f454999e611348342a445.pdf?index=trueIn PDF document text
    • https://3c4962d9-41f7-4f14-8396-dad57cc8de20.filesusr.com/ugd/a2de88_6a2b31d0edc247bdb35c5c099e19db19.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/7911f408-42bd-46ef-b7b5-46f6f6d45844/lidixeparibi.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_off0001000b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1000B 5812 bytes
SHA-256: e04190ebbc01f13f0b6f853f6208c18d3c40688e52ecaa88a86438b33b99b131
font_01_sfnt_off000113f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113F1 10612 bytes
SHA-256: 972de97dfe0b13a07d93f2b4db25ee29e5e49641bdd7ba9ce9935de5cc6dbff7

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