Malicious PDF — malware analysis report

Static analysis result for SHA-256 7920f1c5468555b3…

MALICIOUS

PDF

76.9 KB Created: 2021-02-19 18:02:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 2a0e7c7005816ba088cd54080fce0145 SHA-1: 492a8f18beacef28167c9a26e4168a429fa1099c SHA-256: 7920f1c5468555b3a0c8de510a1dcd026bf92eb8e059c805f6d1a1c00354785e
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high probability of malicious intent. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' and the numerous extracted URLs suggest the document is designed to redirect users to potentially harmful websites, likely for phishing or malware distribution. No scripts were extracted from this sample, but the overall structure points to a malicious document.

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://bologen.ru/strik?utm_term=sharp+carousel+microwave+convection+oven+over-the-range PDF link annotation
    • http://copyrightsupporteds.com/connexions_methode_de_francais_niveau_2_answersg6529.pdfIn PDF document text
    • http://kompledom.com/best_way_to_get_a_new_pair_of_glasses_frames8jgsu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469640/normal_6001573e3ef97.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416940/normal_600f02972be70.pdfIn PDF document text
    • http://myimperfectmomlife.com/child_comedy_video_hdqy63g.pdfIn PDF document text
    • http://hurricane1.space/lost_ark_weekly_quest_guideajked.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479470/normal_5fccf48214114.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412151/normal_60153c076b66e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403143/normal_602d3d8d7f08e.pdfIn PDF document text
    • http://openchambre.xyz/8678736613563k7p.pdfIn PDF document text
    • http://luxshop21.site/64169763243c4itf.pdfIn PDF document text
    • http://kprovk.xyz/vibidiguduwozucimna.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://meluromotav.rf.gd/chrome_canary_build.pdfIn PDF document text
    • http://jivikone.epizy.com/free_jay_chou_waiting_for_you.pdfIn PDF document text
    • https://s3.amazonaws.com/jesidofefe/architecture_shop_drawings.pdfIn PDF document text
    • http://mitufesidu.epizy.com/60990037322.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_off0000ed48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED48 5636 bytes
SHA-256: 9068424486cd76e28ed8ece17760d3f2868727fb8f729fbd984cc99164fd26b0
font_01_sfnt_off00010060.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10060 11144 bytes
SHA-256: 2ddfaf521d85a7228d7a03e5d7558f561c045fb3a8b445aacf84a82811deb3b3

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