Malicious PDF — malware analysis report

Static analysis result for SHA-256 112daff8734b6a8a…

MALICIOUS

PDF

68.5 KB Created: 2020-12-18 23:13:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 801d8abe07ddba48610fd1bc2ad446ef SHA-1: 951ce539dc410338e84feeb13c9ab316616716ba SHA-256: 112daff8734b6a8a8a60d78dc9c6d9a450d29e74d38211e0961469570c49c95e
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains heuristics indicating it is a phishing lure, specifically using an image to redirect users to a malicious URL. The ML classifier and ClamAV detection strongly suggest malicious intent. The embedded URL, https://trafftec.ru/strik?utm_term=firehouse+subs+nutritional+facts, is the primary indicator of compromise, likely leading to a phishing page or further malware download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafftec.ru/strik?utm_term=firehouse+subs+nutritional+facts PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4380083/normal_5f99f87fafb44.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485165/normal_5fbe35c34282e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456391/normal_5fa514e0d2b28.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480162/normal_5fae27bd40388.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417662/normal_5fcaedcf481b4.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/4036bf75-e520-479c-a513-6d7fe62fa3f0/49346236001.pdfIn PDF document text
    • https://s3.amazonaws.com/dazifozixawus/prostate_biopsy_procedure.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9dff0bd-1ccd-48d9-81b2-321883271f45/15637137791.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a1fb5a6c-fd82-46f3-a0aa-2cd1fe73b59c/dopotoduti.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/238b4af1-b07f-42cc-b0fa-e2dbf2784300/20517165933.pdfIn PDF document text
    • https://s3.amazonaws.com/tunenijexe/libera.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fba902b0-b22f-482e-a30a-41697122ae98/cmo_para_mover_aplicaciones_a_sd_ta.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 3

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_off0000c601.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC601 5064 bytes
SHA-256: b918f17fd1e7a687b29bccc7021c3b6aea33975c1cd74231ff18d0139ea4cf35
font_01_sfnt_off0000d737.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD737 14916 bytes
SHA-256: 154a1448322784ce6f61a6e0fb3408699db3c1b92c80f25a4996533206651df4

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