Malicious PDF — malware analysis report

Static analysis result for SHA-256 844d60f7678d373d…

MALICIOUS

PDF

72.3 KB Created: 2021-04-02 01:13:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7d23f98c19df58111de3d168724876c1 SHA-1: e5252410c32a8751fb5a6d4f36ac9578a8c59b80 SHA-256: 844d60f7678d373d96d4b237636524d75eb8c7f09f791093f4c3f319804956b2
96 Risk Score

Malware Insights

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

The file is a PDF that contains an embedded URL pointing to a suspicious domain, identified by ClamAV as Pdf.Phishing.Trojan. The ML classifier also flagged this PDF with high confidence. The document body, though heavily obfuscated, contains text related to environmental impact, suggesting a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://soxebez.ru/award?keyword=positive+human+impact+on+the+environment+pdf
    • https://cdn-cms.f-static.net/uploads/4375908/normal_60471857bae52.pdf
    • https://cdn-cms.f-static.net/uploads/4375339/normal_5fd3a33667046.pdf
    • https://static.s123-cdn-static.com/uploads/4376598/normal_5fe0df49a5a74.pdf
    • https://cdn-cms.f-static.net/uploads/4474752/normal_60415a445998b.pdf
    • https://cdn-cms.f-static.net/uploads/4421468/normal_5fd89c9cd6505.pdf
    • https://cdn-cms.f-static.net/uploads/4480579/normal_60379e895a21e.pdf
    • https://cdn.sqhk.co/jivizedu/gdUidud/aortic_dissection_guidelines_2010.pdf
    • https://cdn.sqhk.co/denepepunuja/gciehgz/castle_story_forum_jungle_monarchy.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/14117671-a2c8-48d7-9b55-dbe1284ee9be/how_not_to_fall_in_love_with_a_jerk.pdf
    • https://uploads.strikinglycdn.com/files/683a8a5a-a978-475d-bc4d-1f64c220cd9c/48800610298.pdf
    • https://uploads.strikinglycdn.com/files/d63fe423-b83b-42c4-b22f-44ebf1cde4ab/singer_spartan_192k_sewing_machine_manual.pdf
    • https://uploads.strikinglycdn.com/files/f32a3494-2585-4fb6-9d54-7efdead54336/bifemabevawovaxewififun.pdf
    • https://uploads.strikinglycdn.com/files/b5e0e875-65ee-4d23-b89d-f327abffd4d4/nitepokowevixulev.pdf
    • https://uploads.strikinglycdn.com/files/5e7293de-c0ac-4cb3-89fb-1ea47e58bbc0/rovolagovomuludijivodu.pdf
    • https://uploads.strikinglycdn.com/files/7a1dcea3-ade1-4724-8c60-fbbf23d05ee9/doxurovusixifit.pdf
    • https://uploads.strikinglycdn.com/files/4cdd2940-336c-4d68-95ea-d2bafd1807af/6928352839.pdf
    • https://uploads.strikinglycdn.com/files/ec7c2d34-cbd7-45a5-9fdf-479133babb63/mogibusovaruzuxesinir.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_off0000dd82.bin
1065caa277a7804cec5d8055cdc51b01f50b3d5edbe2eacb9b8105e5b3dabe66
pdf-font-stream PDF embedded font (sfnt) at offset 0xDD82 5424 bytes
font_01_sfnt_off0000efd2.bin
66c5913f422803a3352a98ddd19216e377b5d42d57cf21438801e85f1b486dd8
pdf-font-stream PDF embedded font (sfnt) at offset 0xEFD2 10600 bytes