Malicious PDF — malware analysis report

Static analysis result for SHA-256 92c004cda7ccc86f…

MALICIOUS

PDF

65.3 KB Created: 2020-12-30 22:40:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 369e8708cf6d67e4df616335a49d8e41 SHA-1: 7d2d0da6fce55e248f81efe503fe9658f5bb15be SHA-256: 92c004cda7ccc86f6d8950f78db4d74dd9aa4d86e0a72f05aec4b5bb005d5a50
244 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file contains a large number of external links, with at least one identified as a malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The document's primary function appears to be acting as a link farm to lure users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/123?utm_term=touching+spirit+bear+whole+book+test+answer+key In PDF document text
    • https://static.s123-cdn-static.com/uploads/4491155/normal_5fe44b6eb0e5d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420747/normal_5fa3bf5f310ff.pdfIn PDF document text
    • https://vurazomuloja.weebly.com/uploads/1/3/4/3/134322302/wiwoguguxado-xugurexu-kutulakos-xofugeribizoved.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381101/normal_5fbc8d5fc9c0c.pdfIn PDF document text
    • https://nasefowiwawenug.weebly.com/uploads/1/3/4/1/134109082/muxajepe_zizap_vegolititatesa_xodovazuka.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487905/normal_5fc245f41e2cd.pdfIn PDF document text
    • https://dozasasakebo.weebly.com/uploads/1/3/1/1/131164234/ce664e12455c98.pdfIn PDF document text
    • https://tejelodaburibav.weebly.com/uploads/1/3/4/3/134317360/30064.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369496/normal_5fa0b9dcee9cb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384819/normal_5f9ce751b10c7.pdfIn PDF document text
    • https://butebipibib.weebly.com/uploads/1/3/4/2/134265815/gotebixegoz_gowarewi_zubotal_luvob.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/210ef20b-c2f7-4910-a04d-bdb8208fc971/whats_the_difference_of_chow_mein_and_lo_mein.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_off0000c08e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC08E 5544 bytes
SHA-256: 7a916ba247030d99ed66d15f048d78e1b42f0f850edf11e7e514da23f7ba8a4a
font_01_sfnt_off0000d37b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD37B 10768 bytes
SHA-256: d5310fdf048922461f2fb6c0b4f612c548a67f8b796698a32f143039dcf3364f

Open this report in the interactive analyzer, or submit your own file for analysis.