Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e03e7ef3039f71e…

MALICIOUS

PDF

62.2 KB Created: 2020-12-22 02:14:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3c707a505c6adfa953536231fe92950e SHA-1: d72a15db93c725318bcfc13a8184a28b8edacc87 SHA-256: 5e03e7ef3039f71e1b468e21bf18c0f272d47264453a543fb278fbb80eb9480b
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic. One of the primary links points to 'trafffe.ru', suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or trojan delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://trafffe.ru/strik?utm_term=pentagon+city+mall+dc+souvenirs
    • https://static.s123-cdn-static.com/uploads/4484994/normal_5fcfa2d72bfb6.pdf
    • https://cdn-cms.f-static.net/uploads/4413866/normal_5fad97f600bb5.pdf
    • https://pezopipowom.weebly.com/uploads/1/3/1/4/131406060/vejerovojerewa-wafuxiboxitixu-pezegusetavowo.pdf
    • https://cdn-cms.f-static.net/uploads/4465142/normal_5fa4609841c2c.pdf
    • https://cdn-cms.f-static.net/uploads/4366055/normal_5fa0319bc89c6.pdf
    • https://pesimavadedeto.weebly.com/uploads/1/3/4/7/134729205/radubinajifiwobanugi.pdf
    • https://gisetokitalakak.weebly.com/uploads/1/3/4/6/134600310/jafexugapozozov.pdf
    • https://cdn-cms.f-static.net/uploads/4378836/normal_5fdbb653341dc.pdf
    • https://static.s123-cdn-static.com/uploads/4426072/normal_5fca47013d84a.pdf
    • https://cdn-cms.f-static.net/uploads/4458634/normal_5faf4257d71ed.pdf
    • https://cdn-cms.f-static.net/uploads/4365582/normal_5faaac05e468e.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/84f7d452-5c72-43ec-9539-46ad1bd1dee7/kohler_fuel_pump_rebuild_kit.pdf
    • https://static1.squarespace.com/static/5fce1d937d85b15ca79fb0aa/t/5fd1a96a23f2866aa38681c9/1607575914770/fashion_design_world_hack_apk.pdf
    • https://uploads.strikinglycdn.com/files/2fd71ba0-c3cc-4ae0-835a-7d3ca05b7e22/78682548179.pdf
    • https://static1.squarespace.com/static/5fc50bdd239b0722914be43a/t/5fc735660623334b0c5beb0b/1606890857428/japagajawoxujimelogebebu.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_off0000b59d.bin
9aec0a0ac60064d40b23c8b39806f2df78df1e9056f1d8040113ffef2ccc3e54
pdf-font-stream PDF embedded font (sfnt) at offset 0xB59D 5424 bytes
font_01_sfnt_off0000c807.bin
2523b89d30c99601d453c19e66db4b35b63d4c6eb6e2b3fb2e3f7ab05d69442c
pdf-font-stream PDF embedded font (sfnt) at offset 0xC807 10668 bytes