Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4bf214a7cc62070…

MALICIOUS

PDF

62.5 KB Created: 2020-11-13 09:22:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f1a4d89f8ce47640aad85c1fc4623bd5 SHA-1: 52ddb08a1a7422b08cdec9b6f2060afbdce31c5e SHA-256: e4bf214a7cc6207037e15f71732fdda9f7c08b0b29ae7ef1b5280f41bf3097a2
96 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. It contains an embedded URL pointing to 'trafficel.ru', which is likely used to deliver a malicious payload or conduct phishing. The document body, though partially corrupted, suggests a lure related to 'calculus problems solutions and tips'. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://trafficel.ru/aws?utm_term=understanding+calculus+problems+solutions+and+tips+pdf
    • https://cdn-cms.f-static.net/uploads/4497650/normal_5fad4f2f1b652.pdf
    • https://cdn-cms.f-static.net/uploads/4495262/normal_5fad3b6fb233d.pdf
    • https://cdn-cms.f-static.net/uploads/4381737/normal_5f8c8a6043f99.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/a040c9cc-a7e4-4e3c-a058-664046f692ca/wimoxapedinunejikadixile.pdf
    • https://uploads.strikinglycdn.com/files/5a180502-f5fd-46ed-8e53-b7ca5e256d57/20880219788.pdf
    • https://s3.amazonaws.com/mibiwivanetuj/bedir.pdf
    • https://uploads.strikinglycdn.com/files/055ed7cd-d4a6-4253-b48b-69424098c8ce/st_johns_county_property_appraiser_homestead_exemption.pdf
    • https://uploads.strikinglycdn.com/files/c241432f-ea2b-4508-8930-9a3b85c33200/revatefujalejarumeno.pdf
    • https://uploads.strikinglycdn.com/files/7ade0140-630c-4f8e-81cf-d7dca2d3ee3c/naruto_tsume_inuzuka_fanfiction.pdf
    • https://s3.amazonaws.com/wuniku/ravitovi.pdf
    • https://uploads.strikinglycdn.com/files/547bf059-00fc-4dec-a80c-f99632af8180/wabufupinifanemizolog.pdf
    • https://uploads.strikinglycdn.com/files/f083affa-c8a9-418a-9764-e29167945777/eragon_trn_b.pdf
    • https://uploads.strikinglycdn.com/files/5ffd2a7e-8014-4e91-8ad0-8ec603d8f291/gospel_of_the_flying_spaghetti_monster_epub.pdf
    • https://uploads.strikinglycdn.com/files/2286d2f7-0e97-44fd-9351-58085a3d84e1/jevevevonufesokasav.pdf
    • https://s3.amazonaws.com/sirasu/numenera_cypher_generator.pdf
    • https://uploads.strikinglycdn.com/files/14f023f6-6e75-4ef2-955a-2d2e7c46461b/union_sun_journal_lockport_obituaries.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_off0000b727.bin
bafb7c62c3d708797ae0c964662f34916cfa65edf2cb4c59fe705fb7632c9cbb
pdf-font-stream PDF embedded font (sfnt) at offset 0xB727 5604 bytes
font_01_sfnt_off0000ca22.bin
a8e19a0661c189085d603ef509a180d9ca75c77cd18748e8b0eee02d5572f6be
pdf-font-stream PDF embedded font (sfnt) at offset 0xCA22 10076 bytes