Malicious PDF — malware analysis report

Static analysis result for SHA-256 e26a0387c5b32e72…

MALICIOUS

PDF

79.4 KB Created: 2021-04-18 23:27:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: d26bbb466461c450331d23d82e226d43 SHA-1: 748633216d260c914080b7e0539076ee6e724f59 SHA-256: e26a0387c5b32e7242d9bdf7b291fb7e78276fabec0ee36e74937f656e71bae8
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous external URLs, many of which are hosted on disposable domains and utilize UTM parameters, suggesting a phishing or link-farming scheme. The PDF's structure and embedded content indicate it is designed to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://leonvi.ru/strik?utm_term=linux+system+programming+sample+code PDF link annotation
    • https://cdn.sqhk.co/gegojagakexu/fCthcFY/google_calculator_latest_apk.pdfIn PDF document text
    • http://fitness1.space/good_morning_america_reporters_nameschjn5.pdfIn PDF document text
    • http://helpcenterbusiness.xyz/praise_and_worship_bible_study_guidetnoi6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417990/normal_60038f3346926.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421339/normal_602c807d08818.pdfIn PDF document text
    • http://firolinulaka.22web.org/bovipinejarorefe.pdfIn PDF document text
    • https://cdn.sqhk.co/wuzufoxo/ijOhcih/prehistoric_fish_meme.pdfIn PDF document text
    • https://cdn.sqhk.co/nadokikado/ajcgf2m/zed_counters_wild_rift.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410727/normal_60135c2bc656c.pdfIn PDF document text
    • https://cdn.sqhk.co/pasivuzuke/zVgdUun/rarexuxovovopemiboroxepip.pdfIn PDF document text
    • http://nextauto02.ru/61992216015pcfuv.pdfIn PDF document text
    • http://islemleriniz.org/57138051736196v0.pdfIn PDF document text
    • http://bonus332.site/miracle_on_34th_street_on_tv_2020qgx0i.pdfIn PDF document text
    • https://cdn.sqhk.co/gorokipo/kihheg5/blue_cross_blue_shield_ma.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://5f98d79b-b704-4ecc-a618-200e52db7f79.filesusr.com/ugd/d1a5b7_24d208be019949aab9e7ca2dd9b3f26f.pdf?index=trueIn PDF document text
    • https://87098103-4d08-48bb-90a6-807b0ef734b2.filesusr.com/ugd/1f49de_cacdb16128b242fa80cf7bee42664bc7.pdf?index=trueIn PDF document text
    • https://4fdc5cb1-0646-4ed0-9ac1-f9332ff2c333.filesusr.com/ugd/9b9480_6c0cbda226274761b6a1638dd1a3e1e2.pdf?index=trueIn PDF document text
    • http://wisunomimat.epizy.com/harry_potter_yla_camara_secreta_google_drive.pdfIn PDF document text
    • https://5db246a0-94da-4013-9f64-c970003367b9.filesusr.com/ugd/ca5179_53e7187775634a03854c8ea65394763f.pdf?index=trueIn PDF document text
    • http://nasukenapab.epizy.com/deep_would_you_rather_questions_buzzfeed.pdfIn PDF document text
    • https://8a7e94d2-1b07-4399-8a7b-cfebf1eb419e.filesusr.com/ugd/e78b77_914efeba3fd2404bb5471365374226f7.pdf?index=trueIn PDF document text
    • https://aed0ee3a-d217-4696-a563-de9ff15d6c37.filesusr.com/ugd/f80e3f_0bca98aa611040fa80c278dd9f82507b.pdf?index=trueIn PDF document text
    • https://77bc4ea4-de20-41c0-a463-a5315db628d9.filesusr.com/ugd/2c69e3_c73c4e49fd974a84989c010ac219a8fc.pdf?index=trueIn PDF document text
    • https://9e9203d9-9f5b-42f2-a849-05e42d741f90.filesusr.com/ugd/3527d5_e97f20ed702e447cb50a4f29c5941d36.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_off0000f8bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8BF 5504 bytes
SHA-256: 1cbf6877b2d0d01f6613d2d135d2aaabe15181cd21d0ce861450e59ce957c198
font_01_sfnt_off00010b6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B6D 10824 bytes
SHA-256: 981a08e1fe1b6a37210909403bef7b43ffa87d71be8f2124b735350d074c2827