Malicious PDF — malware analysis report

Static analysis result for SHA-256 fab42e1cfb851f2b…

MALICIOUS

PDF

68.8 KB Created: 2020-11-18 10:44:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 5d1b78cd3285b127d5d521f35892a72a SHA-1: 141c72318699f58d824dea121ca5398b27a7f0bc SHA-256: fab42e1cfb851f2be231d2dd73821f8185a748fbb2629026e4a48fd4717b87cd
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is a PDF document flagged as malicious by multiple heuristics, including a critical alert for a link to known malicious redirector infrastructure. The embedded URL points to 'cctraff.ru', which is identified as a malicious redirector. This suggests the document's primary purpose is to lure users to a malicious website, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://cctraff.ru/123?utm_term=h2o+polar+or+nonpolar+atom+closest+to+negative+side In PDF document text
    • https://cdn-cms.f-static.net/uploads/4390095/normal_5f9660fdc7775.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423696/normal_5fab97ccd3c46.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/a2e16bf6-49c4-424e-b8ca-820ef00966c8/mikumon.pdfIn PDF document text
    • https://s3.amazonaws.com/dorobukasawituw/lepapogipu.pdfIn PDF document text
    • https://s3.amazonaws.com/jiguwuzobozobaz/cautionary_accidental_finale.pdfIn PDF document text
    • https://s3.amazonaws.com/fowikorejodi/mark_tressel_medford_nj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/98b4e3a2-13f0-4737-a319-f00affffc9a5/54481843052.pdfIn PDF document text
    • https://s3.amazonaws.com/tugabijenovili/cara_belajar_photoshop_cs3.pdfIn PDF document text
    • https://s3.amazonaws.com/tabobujimo/telecharger_catalogue_schneider.pdfIn PDF document text
    • https://s3.amazonaws.com/vasagesorajirem/unblocked_games_plazma_burst_3.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/21761522396.pdfIn PDF document text
    • https://s3.amazonaws.com/liguwubore/characteristics_of_opinion_leaders.pdfIn PDF document text
    • https://s3.amazonaws.com/rotowan/vozerowube.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_off0000d091.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD091 5544 bytes
SHA-256: a943e03f3bd611710ea2d23d2bcaa99dded69467994c0d0b55640f3552441e8f
font_01_sfnt_off0000e35a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE35A 10232 bytes
SHA-256: a7c27b5628f379ec71a6bfcd3f2d85e383af6c3a220201a3a2187cd028438517

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