Malicious PDF — malware analysis report

Static analysis result for SHA-256 96285edc2473fbc2…

MALICIOUS

PDF

81.5 KB Created: 2021-05-09 05:45:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: c0c1dacdce8de55c9e7536d5722f457f SHA-1: 98e36dfeaefaa0468652827737f74d7b89a8e1d1 SHA-256: 96285edc2473fbc2781719934d40fbc05e6e79d04fc45a960a0479e07fe03072
126 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution intent. It contains a high number of embedded URLs, many pointing to disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of 'utm_term' in one URL further supports a phishing or spamming campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://kuzutuzo.ru/strik?utm_term=live+action+role+playing+games+uk PDF link annotation
    • https://cdn.sqhk.co/rapawomo/ygchfRA/45841435454.pdfIn PDF document text
    • http://zedenupivuraj.22web.org/applied_linguistics_and_language_teaching.pdfIn PDF document text
    • http://bemijaragilez.22web.org/75482475124.pdfIn PDF document text
    • http://jakivuxevova.22web.org/how_many_words_do_we_use_today_that_shakespeare_invented.pdfIn PDF document text
    • https://cdn.sqhk.co/siloneza/jbiczha/76381752624.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392668/normal_603ee99922f5f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500440/normal_5ff80173282a7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481831/normal_6036f640b5ddf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463824/normal_603024009e3a1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496580/normal_603c191db7a52.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461763/normal_60467513017b1.pdfIn PDF document text
    • https://cdn.sqhk.co/bebuvasipen/CAgfiiu/bononofol.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://milasumumalun.epizy.com/vefuvefigariwu.pdfIn PDF document text
    • http://vusevupitiwo.rf.gd/25255673674.pdfIn PDF document text
    • http://zasugizej.epizy.com/47065660440.pdfIn PDF document text
    • https://da99f664-88c7-4a27-98aa-0bbcec2e8f57.filesusr.com/ugd/66f3f9_706e58c56947467ca12c9edf41717e28.pdf?index=trueIn PDF document text
    • http://gifimedirawi.epizy.com/zelebatimasuf.pdfIn PDF document text
    • http://zovewopot.epizy.com/kabitexumexuwagi.pdfIn PDF document text
    • https://06e27459-8a58-4d01-a48e-f853eab966f6.filesusr.com/ugd/55f1a0_d10e4f6416174f17ae057b673acd71c3.pdf?index=trueIn PDF document text
    • http://jibulizexamunu.rf.gd/atal_pension_yojana_cancellation_form.pdfIn PDF document text
    • http://mebapuperepomuv.rf.gd/vijupudawiwigumagilukesav.pdfIn PDF document text
    • https://45f61934-b4a1-4335-a9e3-e142d9465b5b.filesusr.com/ugd/0dd040_b204a0805d0b4bc2a9ff4e94a59aa46b.pdf?index=trueIn PDF document text
    • https://bd04a250-715b-4db0-8087-55ec2f714cf5.filesusr.com/ugd/0c2191_515b95bd16c24a9e831d6b5839259ee4.pdf?index=trueIn PDF document text
    • https://ab0007c4-58ca-4db2-ab23-686bae4d53c1.filesusr.com/ugd/8bf248_abbcdb7c91f949eeb3ebe586280d3598.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_off0000feac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEAC 5420 bytes
SHA-256: 015efce8db1c9565caf716ef0d91518b63953eb96209d053674b9f8f3c230442
font_01_sfnt_off0001111e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1111E 11792 bytes
SHA-256: 52712b3419e7dd1646a6503270500600a93d0a3cddf5e8ca3f65947691be77bc

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