Malicious PDF — malware analysis report

Static analysis result for SHA-256 c636a755b7eb3a16…

MALICIOUS

PDF

100.1 KB Created: 2021-03-18 02:23:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6b09d932ff2d3a27a954fc8912f088c6 SHA-1: eb44465915df887cc1eb1bc17b40d45deb0ab04b SHA-256: c636a755b7eb3a16ce4e37b2f632084a18b5bf751db13ebe62e92e71357e3d08
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains an embedded URI pointing to 'jumiwimov.ru', which is likely a phishing or malware distribution site. The document body, though heavily obfuscated, suggests a lure related to a 'new jersey driver manual test'.

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://jumiwimov.ru/wix?keyword=new+jersey+driver+manual+test
    • https://sezavifibeka.weebly.com/uploads/1/3/4/4/134463458/xusixupudax.pdf
    • http://zezasarasojid.mywebcommunity.org/ford_1715_tractor_ignition_switch.pdf
    • http://felagem.getenjoyment.net/wigimusoje.pdf
    • https://cdn-cms.f-static.net/uploads/4370767/normal_604ef5b672266.pdf
    • https://cdn-cms.f-static.net/uploads/4413713/normal_60382fdf65efa.pdf
    • https://jufufowepum.weebly.com/uploads/1/3/5/3/135348100/8096986.pdf
    • http://zugugalepew.mypressonline.com/bijamilaponumuw.pdf
    • https://rajuwirorevub.weebly.com/uploads/1/3/5/3/135306937/3424952.pdf
    • https://cdn-cms.f-static.net/uploads/4480598/normal_6036be0b522f1.pdf
    • https://mudulavodeg.weebly.com/uploads/1/3/1/0/131070753/nulorosiwulomajuw.pdf
    • https://cdn-cms.f-static.net/uploads/4494139/normal_5fda8f688a4c0.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/dosipive/79859167699.pdf
    • https://s3.amazonaws.com/lorifumofelu/18144065506.pdf
    • http://jiwodiw.myartsonline.com/wernicke_s_encephalopathy_treatment.pdf
    • http://pexirud.onlinewebshop.net/karenolovazurimobepodi.pdf
    • https://uploads.strikinglycdn.com/files/0afd3a85-48d2-4f82-882e-9c0e85a85e2e/35984313589.pdf
    • https://uploads.strikinglycdn.com/files/c1cbc231-7a43-4117-b65f-dc7bf59083da/what_is_the_meaning_of_chemical_equation_in_english.pdf
    • http://ligoroxenafof.atwebpages.com/world_of_darkness_combat.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_off00014865.bin
c04a79bc8b00ab6501f3bfd6acf8f839883769e8706686bbd81d96e258800eb7
pdf-font-stream PDF embedded font (sfnt) at offset 0x14865 5272 bytes
font_01_sfnt_off00015a56.bin
f708239cc31a5ce9a2cb7fab5b1037b916852db1778ed419ecfade35eebc59c5
pdf-font-stream PDF embedded font (sfnt) at offset 0x15A56 11880 bytes