Malicious PDF — malware analysis report

Static analysis result for SHA-256 03eb1efecba83bab…

MALICIOUS

PDF

76.9 KB Created: 2021-04-05 18:24:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 2f7628b023121e6dbd156648eddfe082 SHA-1: 5d56375533d66d4751277df204ce6a33d0f4b105 SHA-256: 03eb1efecba83bab78185e4626c1d8315a0056d2376f63f9b57dd53aaa037364
126 Risk Score

Malware Insights

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

The file was detected as a malicious PDF by ClamAV and an ML classifier. It contains numerous external URLs, many of which are hosted on disposable domains or link farms, suggesting a phishing or malware distribution scheme. The PDF's structure and embedded URLs indicate it's likely used as a lure to direct users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://golowaki.ru/award?keyword=physiological+benefits+of+meditation+pdf PDF link annotation
    • https://cdn.sqhk.co/fujotojaxob/gOjdijL/prison_break_season_4_ending_review.pdfIn PDF document text
    • http://vehicleusains.com/vefapaburovezewf6bf.pdfIn PDF document text
    • http://remont-kholodilnikov.website/mofafa8557k.pdfIn PDF document text
    • https://cdn.sqhk.co/ditetijesi/jjqhfib/76313821530.pdfIn PDF document text
    • https://cdn.sqhk.co/nusatabi/icjh7Sd/mi_telcel_recarga.pdfIn PDF document text
    • http://dream-stat.ru/32513237144i4nw8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471992/normal_606a380030d3c.pdfIn PDF document text
    • https://cdn.sqhk.co/linidivez/gkgcKjf/wobabukefigomi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377706/normal_5ffad57e4b852.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451369/normal_6054ea02b3eec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489587/normal_60373ff184140.pdfIn PDF document text
    • http://brettlockhart.com/pudding_monsters_2-_25_3_starsq2m4z.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426810/normal_604aff174ef5b.pdfIn PDF document text
    • http://salonvarna.com/86319071413m1jgg.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/vedexajawo/82473094372.pdfIn PDF document text
    • https://84d51d8d-5932-465a-b044-5d36dace581c.filesusr.com/ugd/98e2de_d3d5f51f46b746aea91667bc61ecb767.pdf?index=trueIn PDF document text
    • https://9301df3d-c689-496c-811c-0581e5fecd74.filesusr.com/ugd/f62067_cb8feb31dc2d418a9484f7c15cc5bccd.pdf?index=trueIn PDF document text
    • https://c69a8150-bb1e-4c46-878b-fc1622391bd7.filesusr.com/ugd/cf91d6_8bf3dfc611c64f0ea06d996da12691a8.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/ginutu/gaxixagexipu.pdfIn PDF document text
    • https://73af689e-4c80-4f62-99d3-7a886641ad81.filesusr.com/ugd/3b5dd9_b5c8d361b63c410e8a11b24b4b3312b7.pdf?index=trueIn PDF document text
    • https://a0e9597c-cfbb-4fc1-b0e0-47ed6411b148.filesusr.com/ugd/24269e_38f68f5b5f10449db16d4f6ed6561ac1.pdf?index=trueIn 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_off0000ed70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED70 5716 bytes
SHA-256: 7419a9259cd541e70b7959b4e97b17257e6c6d071b554bdc95edc806630f72dd
font_01_sfnt_off000100cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100CB 10960 bytes
SHA-256: e7a953e99dec11422d8d1e8acad5c708403bbd0f6397bdb4aad54bd3efb13601

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