Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b6cfd3c88b339fb…

MALICIOUS

PDF

62.2 KB Created: 2020-11-23 06:08:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 31eba1bf3912694eadf9c0374a72628f SHA-1: dcd517c1108a52c5eeb771ce9e0053f054f6bd12 SHA-256: 4b6cfd3c88b339fb28c4807ad72f66205a8fd53c1f872a6de97e5e6b745678d8
96 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • 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://traffnew.ru/123?utm_term=craigslist+rochester+ny+jobs+manufacturing PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4459926/normal_5fb5f04ef3736.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450147/normal_5fad62f6e0e9f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367950/normal_5f89fd7fef498.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/bd183de5-7fc5-4488-baed-f8691abedceb/zurunupojirez.pdfIn PDF document text
    • https://s3.amazonaws.com/fosagoba/mr_edwards_little_house_song_he_sings.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e2393e8-69a2-43fd-b121-b62cfa4ef72d/estructura_de_lewis_so3.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02b00918-08a6-49cd-b2c3-490cc630ae52/day_of_the_tentacle_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/43320644255.pdfIn PDF document text
    • https://s3.amazonaws.com/resixexi/roku_quick_start_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b433704-1307-42be-9ea0-2855488bb95c/words_that_start_with_tum.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/935fc51f-6002-4ca9-a1d8-1836ce985ef8/bomajofobanawezalak.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62662e03-3c69-4bba-9b54-c114a3220381/character_progression_pathfinder.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_off0000b50b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB50B 5516 bytes
SHA-256: d287f90923d7217efd584a2b722b0dae4c9a34e0bd13082045d4a4d8e17ac220
font_01_sfnt_off0000c7b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7B4 10776 bytes
SHA-256: 2d5b7190c053184b4fc7274703963785151d60daceebee62070983b39dacffe4