Malicious PDF — malware analysis report

Static analysis result for SHA-256 321d1df55adfdc26…

MALICIOUS

PDF

81.4 KB Created: 2021-05-25 04:23:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 3e1eb7e0ba2baefcef5b1958eb739056 SHA-1: 1994f076dcfb9af23256e00bcca407a59155cd13 SHA-256: 321d1df55adfdc266240cac757602326ac9304adc524cf6e438fce9db038f457
134 Risk Score

Malware Insights

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

The PDF file contains heuristics indicating it is a link farm on disposable hosting, designed to redirect users to external URLs. One prominent URL, 'https://lozipotod.ru/strik?utm_term=car+parking+multiplayer+mod+apk+4.7+4', is presented in a way that suggests a download. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://lozipotod.ru/strik?utm_term=car+parking+multiplayer+mod+apk+4.7+4 PDF link annotation
    • https://wuwawibef.weebly.com/uploads/1/3/4/6/134608234/6162167.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393632/normal_602738f18d035.pdfIn PDF document text
    • https://zadopuvaja.weebly.com/uploads/1/3/4/8/134892734/86ded43ab10a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414687/normal_5fd94b2f0a49b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392668/normal_600817b5de29b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458388/normal_60200ac67c0f3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377095/normal_60021a5a4fd1f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406241/normal_602a5a89e7304.pdfIn PDF document text
    • https://mepagalupotope.weebly.com/uploads/1/3/4/2/134265457/1cd9764eeb.pdfIn PDF document text
    • https://ziwagunu.weebly.com/uploads/1/3/4/8/134883986/2847f837d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393197/normal_60088bc8cb5af.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420602/normal_5fdd30e225afd.pdfIn PDF document text
    • https://zozesikijep.weebly.com/uploads/1/3/4/5/134586683/05dbddce.pdfIn PDF document text
    • https://bumobuzeki.weebly.com/uploads/1/3/4/4/134477779/kogonolegij-liziripe.pdfIn PDF document text
    • https://votadewigul.weebly.com/uploads/1/3/0/7/130775387/4972666.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368235/normal_60082c0ca1d04.pdfIn PDF document text
    • https://puvovajol.weebly.com/uploads/1/3/4/0/134040332/koraruzi.pdfIn PDF document text
    • https://tezolusubugejel.weebly.com/uploads/1/3/5/3/135314563/4295ce94d.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/vovuzize/warhammer_dwarfs_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea6a5752-bcfd-4cd3-b54e-be288763e71c/uniden_loud_and_clear_phones.pdfIn PDF document text
    • https://s3.amazonaws.com/perurulexi/lenijom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6bf9699a-9253-48e5-8a71-a76c04587c91/supply_chain_management_entry_level_jobs_toronto.pdfIn PDF document text
    • https://s3.amazonaws.com/jowutoneranemuk/carrier_command_gaea_mission_manual.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC7B 5372 bytes
SHA-256: 4584511ff0a45cffedf4cf3b49f507807ae0f9135411ac6bc9fc68d42071db25
font_01_sfnt_off0000fecd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFECD 10452 bytes
SHA-256: a90d2a3c7bc39ad9dda5c9ac66d25c303d70e55d4278227d38c4d7442cb60f61
font_02_sfnt_off000122fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122FE 16076 bytes
SHA-256: 7348a63ea9206f1dd9d85ac5b8e77a4d6d13d552d707fc8209e912c0db264539