Malicious PDF — malware analysis report

Static analysis result for SHA-256 3bc98e108d754bb3…

MALICIOUS

PDF

80.6 KB Created: 2021-02-07 16:22:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 3a5cd2e09368a17852abc352c062e131 SHA-1: 7e3cb26b9b13fc7aeafda66f7e9a176f80d9f33b SHA-256: 3bc98e108d754bb31b84358d8f9c95907508b18889c16caa97919936dd7a3f10
196 Risk Score

Malware Insights

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

The PDF contains numerous external links, with a critical heuristic indicating a link farm designed to redirect users. The SE_PAYMENT_REDIRECT_LURE heuristic suggests the content is designed to trick users into believing there are new or changed payment instructions. While no scripts were directly extracted, the PDF structure and link farm behavior are indicative of a phishing or redirection attack, likely initiated via a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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.
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise 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://seumenha.ru/123?utm_term=simple+machines+examples+of+pulleys PDF link annotation
    • http://xrootunited.com/lawotifafajupiso2zi5o.pdfIn PDF document text
    • http://reduslimitalia-official.site/11742331874pmhm2.pdfIn PDF document text
    • http://vseti.life/adobe_acrobat_pro_dc_serial_number_lu1wk4.pdfIn PDF document text
    • https://bosamekuxukis.weebly.com/uploads/1/3/4/6/134672370/tutepasofegulumukake.pdfIn PDF document text
    • http://ellmax-site.xyz/after_effects_text_animation_tutorialuw68y.pdfIn PDF document text
    • https://zekasujiminog.weebly.com/uploads/1/3/4/3/134366003/ebb1858d51.pdfIn PDF document text
    • https://vepawedisekonok.weebly.com/uploads/1/3/4/9/134900222/0f8303ef3b0e41e.pdfIn PDF document text
    • http://3gusevshop.space/harina_de_reposteria_en_english7ekrj.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/jeduzizonox/my_autograph_kannada_all_songs.pdfIn PDF document text
    • https://s3.amazonaws.com/tamovagag/android_auto_fm_radio_app.pdfIn PDF document text
    • https://s3.amazonaws.com/xiwevitox/xemut.pdfIn PDF document text
    • https://s3.amazonaws.com/semuxemakaw/zifotogajakuwez.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_off0000fedc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEDC 5432 bytes
SHA-256: 66cd02084352831954be554df966e7704261f96c15f53956489a1e9059814b7f
font_01_sfnt_off00011142.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11142 10580 bytes
SHA-256: 27849ec3afab31621cea079c6b3612000c9c611ab792da9e49488833cda32d2c

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