Malicious PDF — malware analysis report

Static analysis result for SHA-256 6befe065a0833f9f…

MALICIOUS

PDF

66.2 KB Created: 2020-12-19 08:42:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: dd42e94742f35cc8c44d16677c284fb9 SHA-1: 222854bfae55eb45a9e6ed40580180a84f5a6ad5 SHA-256: 6befe065a0833f9f9c582f83ee044822cc0eb6a423ce2e08e610dd34c7070e06
194 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains embedded links that redirect to a known malicious URL, identified as a redirector for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the presence of malicious links and the nature of the heuristics suggest the document is designed to trick users into visiting a harmful site, likely for credential harvesting or further payload delivery.

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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://traffine.ru/strik?utm_term=chamberlain+clicker+keypad+programming+instructions In PDF document text
    • https://cdn-cms.f-static.net/uploads/4408718/normal_5fba82b56d724.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376362/normal_5f94e5b0cd4b2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fdd3a932dcd53187f1eaf8b/t/5fdd77aba478394ebc8bf937/1608349611862/juxakofedepatadezuvives.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc36c8fec917750a3e7ce8f/t/5fc95c66306caa37b38384b0/1607031910843/fudazirebogubes.pdfIn PDF document text
    • https://s3.amazonaws.com/wukevirenesu/write_equation_in_center-_radius_form.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5b7d0ab79f442f24a7d59/t/5fceac4eeb7447177aaa173b/1607380046862/easy_mark_usa_today_crossword.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxutedi/91736634107.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f0e5bc7-7970-4a09-9936-0f3220b4dc28/ford_lightning_for_sale_az.pdfIn PDF document text
    • https://s3.amazonaws.com/gomaxod/gelafiwon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/20a5f5c9-6511-4745-85c1-116def46a4d1/70263004284.pdfIn PDF document text
    • https://s3.amazonaws.com/jejulurowev/iir_butterworth_filter_using_bilinear_transformation.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_off0000bfff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBFFF 5700 bytes
SHA-256: b5579a86ba4e1c36d7e706382c76e4b421401f8e2717f1b1448aaca7195df761
font_01_sfnt_off0000d32e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD32E 11540 bytes
SHA-256: 5f5cc7e0389367d8c257c5c5c7653bad4a45e387c8adb8d16c2720dcac5238fd

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