Malicious PDF — malware analysis report

Static analysis result for SHA-256 bcfc26844dffc459…

MALICIOUS

PDF

70.0 KB Created: 2021-02-16 08:41:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 35ac5e2222d818c505180f8fa02bdb1a SHA-1: 70cb6e8785e5805efd6cb59c1c592d4b956887b8 SHA-256: bcfc26844dffc459388f3e770d345126276e06df179dfe1985ac99a910d3ab7a
156 Risk Score

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 0.9998

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 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.
  • 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=first+alert+sa303+expiration+date PDF link annotation
    • http://hydraruzxpnew4af.exchange/sanawexznpv.pdfIn PDF document text
    • https://gofolepoxi.weebly.com/uploads/1/3/4/8/134882907/surafurez.pdfIn PDF document text
    • http://hhizmet.com/play_free_3d_train_simulator_games_onlineipjny.pdfIn PDF document text
    • https://xitukamobem.weebly.com/uploads/1/3/4/6/134643312/bawimubabope-pokusovepi.pdfIn PDF document text
    • http://itayoga.space/rumexokavifanimospoywb.pdfIn PDF document text
    • https://kojaxinepizoju.weebly.com/uploads/1/3/1/8/131856409/9349088.pdfIn PDF document text
    • http://roman-holidays.shop/contract_compliance_audit_templatewv4mz.pdfIn PDF document text
    • https://xifekuvazunavel.weebly.com/uploads/1/3/4/7/134748582/7750056.pdfIn PDF document text
    • http://xupevagadozojad.22web.org/taletefeful.pdfIn PDF document text
    • https://joverukaded.weebly.com/uploads/1/3/4/4/134433057/kosevax.pdfIn PDF document text
    • https://bolubevegu.weebly.com/uploads/1/3/1/4/131454373/f21d23e983.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/zopenave/little_drummer_boy_sheet_music_free.pdfIn PDF document text
    • https://s3.amazonaws.com/sajatesawodiji/74621284913.pdfIn PDF document text
    • https://s3.amazonaws.com/bokexizometun/business_plan_format_examples.pdfIn PDF document text
    • https://s3.amazonaws.com/widetunipet/82024985095.pdfIn PDF document text
    • https://s3.amazonaws.com/sigobija/63275042334.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_off0000d663.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD663 5280 bytes
SHA-256: 9964c20419b9cd241481c29b72db794c73af780e988a892be74709af1a806d1b
font_01_sfnt_off0000e865.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE865 10136 bytes
SHA-256: 7623dd37ed0f279ef2e9a64e64efdd75c1c59e65b3ebc2326a2c9dcea4bfd990

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