Malicious PDF — malware analysis report

Static analysis result for SHA-256 2104cd68855abfb2…

MALICIOUS

PDF

81.9 KB Created: 2021-02-28 08:07:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 93f01a3ea0193ff4bd9098c50e284346 SHA-1: 70a428b22e8587c800cbd93195a3861076095669 SHA-256: 2104cd68855abfb28085bffffa95a1d1efd9f4df963c3c538cb3f2c7f7f40ce3
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded links, many pointing to disposable domains, suggesting a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/123?utm_term=how+to+set+up+sharper+image+wireless+headphones PDF link annotation
    • https://cdn.sqhk.co/malevevipali/iamaWBO/dragonvale_breeding_chart_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/lotidonita/QslW2ge/sunuvalumitanoboporozizix.pdfIn PDF document text
    • http://hydraruzxpnew4af.exchange/843530950615urab.pdfIn PDF document text
    • http://topmassage.net/kannada_channels_live_tv_for_androidwv6h8.pdfIn PDF document text
    • https://cdn.sqhk.co/lituxopevuk/JgjngiC/12956815898.pdfIn PDF document text
    • https://cdn.sqhk.co/raninogozo/gcphjif/sowebuzinagorerine.pdfIn PDF document text
    • http://fowaxulop.iblogger.org/frigidaire_50_pint_dehumidifier_specs.pdfIn PDF document text
    • http://lovojat.22web.org/duvajavugemiper.pdfIn PDF document text
    • https://cdn.sqhk.co/ridasozewe/Uje8cWv/werebaxajola.pdfIn PDF document text
    • http://aazzzry.space/973296512987j66l.pdfIn PDF document text
    • https://cdn.sqhk.co/jeporikate/hfynCii/galaga_arcade1up_walmart.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gazunobopa.epizy.com/58038763812.pdfIn PDF document text
    • http://jejotatimub.rf.gd/95526823230.pdfIn PDF document text
    • http://wubogijogazerew.epizy.com/reporter_live_video_gana.pdfIn PDF document text
    • http://roragopijejem.epizy.com/24299660011.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_off00010456.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10456 5428 bytes
SHA-256: 3862fb1117510a613122cc5039ba003071476a5404e34a386849da9a18659442
font_01_sfnt_off000116ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116AD 10680 bytes
SHA-256: cdf7e855f41f71e4f5b452e455ca5f9d0e1695b0e85ac0b7e67d19e0124cf15d

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