Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8c16048004c2626…

MALICIOUS

PDF

64.6 KB Created: 2020-11-22 08:42:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: e94875860f7885fabc667bd869a367fc SHA-1: e0fe7fe3684d97cd7671191bb8165c35c93619b5 SHA-256: f8c16048004c26263938b6b5f12bd1b9e4d0ba9b105f968832b59519e6e672ea
202 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains a link to 'traffmen.ru', identified as a malicious redirector and associated with brand-impersonation credential phishing, specifically impersonating Apple. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and the presence of a malicious URL suggest it's designed to lead the user to a malicious site, likely for phishing or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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.
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://traffmen.ru/123?utm_term=monohybrid+cross+worksheet+14+answers.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://traffmen.ru/123?utm_term=monohybrid+cross+worksheet+14+answers In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/gazitif/famigamex.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/06ab83ea-3f36-453e-ae1a-e34b85c09fde/jamis_road_bike.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e9cd61a-efc9-4706-bf15-bffe98c2640e/40175602284.pdfIn PDF document text
    • https://s3.amazonaws.com/dinilederu/alice_pack_field_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/536e870d-030b-4a5a-9117-408d55b49c0c/28268025674.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af91e170-1a5f-44ba-a32c-44546fe72922/minegelolololu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2442ae30-f051-4a32-883e-3c7f1cd75200/19336558237.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/596ec441-51d1-4f41-958c-d499b6549d69/construccion_panel_thermochip.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76e04137-d4c7-4e40-9c2f-4f564af47a35/doctor_who_theme_midi.pdfIn PDF document text
    • https://s3.amazonaws.com/bejexe/vadobiveg.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

Related samples 4

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c028.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC028 5540 bytes
SHA-256: 94be27df2c245d1880e9a3ad9eec066cbc7f9dca8a60b13d52550875961f36a3
font_01_sfnt_off0000d31d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD31D 10184 bytes
SHA-256: ed28f532c65b9713c3b3a39dbe62f73a4daa31b067f6323a687854099fa3fee2

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