Malicious PDF — malware analysis report

Static analysis result for SHA-256 e93e7f7f6fc5f15e…

MALICIOUS

PDF

65.7 KB Created: 2020-11-25 01:23:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 51ab09885e198b91211f7cd8dfeab8c8 SHA-1: e4c840631eadebcc378f1a88b32d0084e4dc9643 SHA-256: e93e7f7f6fc5f15ec9c115c552211a15d111238a1d8142ff13d64522929ea9ef
194 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://cctraff.ru/123?utm_term=teton+high+school'. This URL is also listed as an embedded URL within the document. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware delivery. No scripts were extracted, but the presence of a malicious redirector is sufficient to infer a phishing attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9979

Heuristics 5

  • 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.
  • 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://cctraff.ru/123?utm_term=teton+high+school In PDF document text
    • https://muxalibozut.weebly.com/uploads/1/3/4/7/134718599/tekuron.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391920/normal_5f9c827662c98.pdfIn PDF document text
    • https://tenanetudoji.weebly.com/uploads/1/3/4/2/134266315/6336807.pdfIn PDF document text
    • https://wotafoxig.weebly.com/uploads/1/3/4/3/134306194/zisipinuje.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/lijopavexanuse/how_to_make_a_photo_transparent_ppt.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e01836ad-ce3e-44c1-a99e-29a816ae703d/zokugokawumemedokose.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7653243-396f-47f6-a273-9ab1532fc11c/1578210176.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/53419362-b8a8-4bb0-9b16-aa483c9e3c67/completing_the_square_worksheet_circles.pdfIn PDF document text
    • https://s3.amazonaws.com/sedimeraxufi/niv_1984_bible_free_download.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 8

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_off0000c43d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC43D 4704 bytes
SHA-256: 456f34ed564ccdf46b2a2c1a60f610bbf0df894111ec7c48fe2b8687a6701ea4
font_01_sfnt_off0000d44c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD44C 11468 bytes
SHA-256: f741d8d138de43ac3b68e680874faef976468525c15314de2637dffcfaa4ba89

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