Malicious PDF — malware analysis report

Static analysis result for SHA-256 6453b10c55a4c4ed…

MALICIOUS

PDF

70.8 KB Created: 2020-11-24 12:46:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ef81c79ccf2ef7209ff4777747f42613 SHA-1: 1fc2c5e96f9bed31223d2172bff425720212ece9 SHA-256: 6453b10c55a4c4edf7fa7f67f5cadc6b6f0ab3d8477e68be0dc21d1aa1bcec9d
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, which is a strong indicator of phishing or malware distribution. The ML classifier and ClamAV detection further support its malicious nature. Although no scripts were extracted, the embedded URL is the primary indicator of compromise, likely leading to a phishing page or a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/strik?utm_term=gw2+bloodstone+harvest+guide
    • https://cdn-cms.f-static.net/uploads/4444371/normal_5fb3fbfe84c0c.pdf
    • https://cdn-cms.f-static.net/uploads/4393209/normal_5fb8117647586.pdf
    • https://cdn-cms.f-static.net/uploads/4444853/normal_5fab6884c502b.pdf
    • https://cdn-cms.f-static.net/uploads/4416934/normal_5fb80c9747376.pdf
    • https://cdn-cms.f-static.net/uploads/4386851/normal_5f8fddc335054.pdf
    • https://cdn-cms.f-static.net/uploads/4410190/normal_5fa47031c005f.pdf
    • https://cdn-cms.f-static.net/uploads/4388422/normal_5f9939668d364.pdf
    • https://guzozexuvuro.weebly.com/uploads/1/3/4/3/134322735/malaj.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/fomaralunex/full_craven_edge_weapon_sheet.pdf
    • https://uploads.strikinglycdn.com/files/e3e13c86-1cfa-4029-b0b0-948e174edf6a/ufc_242_live_stream_link.pdf
    • https://s3.amazonaws.com/gedimuta/hemorragia_digestiva_por_varices_esofagicas.pdf
    • https://s3.amazonaws.com/subud/wasema.pdf
    • https://s3.amazonaws.com/tulosa/things_that_start_with_j_at_the_grocery_store.pdf
    • https://s3.amazonaws.com/fejatepudopito/76044685488.pdf
    • https://s3.amazonaws.com/lodazojamuva/27958353507.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d51f.bin
dc354327dffd2dfd81093d55a7fb35460e54f3ce98fc490cf43d27f3907b7c22
pdf-font-stream PDF embedded font (sfnt) at offset 0xD51F 5540 bytes
font_01_sfnt_off0000e80f.bin
780162a772a1dd81073a9222aab884c08bf7f73ccaf385fd26b07474432db6b8
pdf-font-stream PDF embedded font (sfnt) at offset 0xE80F 11028 bytes