Malicious PDF — malware analysis report

Static analysis result for SHA-256 321e386c8d233a64…

MALICIOUS

PDF

78.2 KB Created: 2021-03-20 20:26:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: fc7b951efcb6c38fb254e733e7e83c08 SHA-1: e889c91a0ca096feda61d7ef0a099659334e9042 SHA-256: 321e386c8d233a64b88c1de8881b8cf0bec62ea131e7920189ee2605273a53d4
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 0.9993

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://lozipotod.ru/strik?utm_term=code+name+verity+characters PDF link annotation
    • http://wotomonexu.22web.org/bizamaderanilamonapoxat.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467019/normal_602575d10f1f3.pdfIn PDF document text
    • https://tupokigefadewun.weebly.com/uploads/1/3/4/7/134702618/1c736b0e1fa6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487399/normal_601db8582465a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470408/normal_5fef6a6f2298a.pdfIn PDF document text
    • http://lemoxovuv.22web.org/zagokazokozanuzepub.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386851/normal_5ffb2512e32e9.pdfIn PDF document text
    • http://repair-foto.ru/11404893815v2rsf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378167/normal_603455bf0c6d8.pdfIn PDF document text
    • https://nifiguxo.weebly.com/uploads/1/3/1/3/131398563/9fc31794e9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484806/normal_604ba5db846e8.pdfIn PDF document text
    • http://getliterate.online/75485003074r66h1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485015/normal_6006bb3064e35.pdfIn PDF document text
    • http://niludop.22web.org/west_side_story_maria_piano.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458616/normal_60142d0779bc5.pdfIn PDF document text
    • https://jumabesabixoduz.weebly.com/uploads/1/3/4/3/134368642/3642859.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474448/normal_6040672397bf5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488332/normal_6027294d5f6aa.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/66f63a67-836e-4e08-8151-828467a28507/how_much_did_an_ipod_nano_cost_in_2008.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/08f4c594-e8b7-4ed1-9970-4750cfec487c/kolupewewomuge.pdfIn PDF document text
    • http://situxunekidini.epizy.com/du_video_screen_recorder_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/023ba49e-f7a8-49a5-ac05-5b8bbd6fa651/60234667604.pdfIn PDF document text
    • http://fojoxolizono.rf.gd/gadajeduzibazadasexowowem.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_off0000f235.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF235 5216 bytes
SHA-256: ff55ada3ca99a99c4bb86ba25d4b101ee90ed2447bb6df02825bc4e0077f84b0
font_01_sfnt_off000103cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103CC 12188 bytes
SHA-256: 9b10e2f27025943bb7b1a6e72bbc7c78f7c822dadfe7bc19115406d90ddf5577

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