Malicious PDF — malware analysis report

Static analysis result for SHA-256 373b735b1d93945f…

MALICIOUS

PDF

71.0 KB Created: 2020-12-22 04:41:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 2625706a6e579cd04a12dc72f4027c52 SHA-1: 53107b4c3c951ad01fa45748bb4c7b1503035434 SHA-256: 373b735b1d93945feab1cefcb752a809599938a369bb95e14578d5408a772bb7
136 Risk Score

Malware Insights

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

The PDF document contains heuristics indicating it is a phishing lure, redirecting users to a suspicious URL. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were directly extracted, the PDF structure and embedded URI point towards a common phishing tactic of redirecting users to a malicious site for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://traffnew.ru/strik?utm_term=nuts+and+bolts+store+near+me PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4411709/normal_5fab2fa7028a1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451555/normal_5fa4b9c00f3cf.pdfIn PDF document text
    • https://s3.amazonaws.com/dufekifaral/civilization_5_guide_science_victory.pdfIn PDF document text
    • https://s3.amazonaws.com/fedojigudaj/fivekukemos.pdfIn PDF document text
    • https://s3.amazonaws.com/xapota/equivalent_ratios_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/teximikamukubo/nukijipegosojawanikemepe.pdfIn PDF document text
    • https://s3.amazonaws.com/rokuwapesu/viewsonic_vx2433_wm.pdfIn PDF document text
    • https://s3.amazonaws.com/viregujipowuru/zimeguxipivinobopifadinu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461516/normal_5fd7d9d49ecdb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490529/normal_5fca91e621319.pdfIn PDF document text
    • https://s3.amazonaws.com/zomuzigo/how_to_clean_a_taurus_g2c_9mm_pistol.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405414/normal_5f9b3013db2cf.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/037f0220-c153-4b72-b04b-6339dda1d39e/pusesugel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9038e671-dae9-4441-904c-8aad8b43a9f7/47691695787.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be0f71aa-af2c-45a9-a089-7cf8d5f7d7d5/nawuxovujabowixali.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_off0000d972.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD972 5080 bytes
SHA-256: d3cc5dac04820c9480fd8ef957a568111b95dec793990c2d2bc078a839e7dbcc
font_01_sfnt_off0000eaa0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAA0 10788 bytes
SHA-256: 7d932757b50d2ff6a8c8c8139a4926dc75469fc5e6ea1953f8d4a64545070fe0