Malicious PDF — malware analysis report

Static analysis result for SHA-256 40f63ebe3c4648b0…

MALICIOUS

PDF

75.9 KB Created: 2021-01-09 23:50:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 1910c13ed9a4e4662feab4115d6e53dc SHA-1: e552e80a86f1d82d3bb6fc9cb53658f6d4cc5f70 SHA-256: 40f63ebe3c4648b0bd07f1c94d78531a5e425243ffeff8b1ad74b8472957ec23
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file contains numerous embedded links, with at least one pointing to known malicious redirector infrastructure. The heuristic firings indicate a malicious redirector and a link farm, suggesting the document's primary purpose is to drive traffic to potentially harmful websites. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a phishing or scam attempt.

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
  • 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.
  • 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.
  • 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://gettraff.ru/aws?utm_term=career+guidance+after+10th+chart+pdf In PDF document text
    • https://voxapinave.weebly.com/uploads/1/3/2/7/132740917/mewobifobow.pdfIn PDF document text
    • https://gukijofajileraw.weebly.com/uploads/1/3/4/3/134392650/monosil.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378381/normal_5fd0e78163cf9.pdfIn PDF document text
    • https://kurasapar.weebly.com/uploads/1/3/4/9/134902571/8031913.pdfIn PDF document text
    • https://site-1177584.mozfiles.com/files/1177584/2048_3d_plus_pc.pdfIn PDF document text
    • https://site-1176298.mozfiles.com/files/1176298/happy_trails__io_game_unblocked.pdfIn PDF document text
    • https://powudeli.weebly.com/uploads/1/3/4/7/134772307/nojuro_danini_nomifudev_dejagupigewog.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/fokapikow/sample_email_asking_for_informational_interview.pdfIn PDF document text
    • https://s3.amazonaws.com/kefiperizonofu/vector_checklist_template.pdfIn PDF document text
    • https://s3.amazonaws.com/votawawo/accidents_reported_yesterday_in_utah.pdfIn PDF document text
    • https://s3.amazonaws.com/godoremitiwuja/american_made_movie_in_tamil_dubbed.pdfIn PDF document text
    • https://s3.amazonaws.com/xujitezu/bob_s_burgers_season_9_episode_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/ruzumeb/abdominal_muscle_strain_exercises.pdfIn PDF document text
    • https://s3.amazonaws.com/saziwijaxodav/tinker_vs_des_moines_case_arguments.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_off0000ed2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED2C 5304 bytes
SHA-256: b5697d5467cd6a7e57bec3ca0fdcbed238b7114001f8dd5f1f538e55e7225af0
font_01_sfnt_off0000ff3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF3A 10320 bytes
SHA-256: 6fa8bf2a071b6d3032a5ca3a101cea032c04693bfa3ff58e3963654738d67965

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