Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3c6f43590c1ed13…

MALICIOUS

PDF

74.6 KB Created: 2021-04-03 02:34:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 53e0c808aa013c1dc2db1cde521008d6 SHA-1: 7a1d8760b21415197ed9cb7c5973c5e2589b37bf SHA-256: b3c6f43590c1ed13c405f8d69bb8e39f4aab360a5c938554a023cde50022f3a4
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a high risk score. It contains an embedded URI pointing to a suspicious domain, suggesting a phishing or malware distribution lure. The document body, though heavily obfuscated, contains keywords related to PDF conversion, reinforcing the lure. No scripts were extracted, but the presence of external links and the nature of the heuristics indicate a likely attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://botokaw.ru/award?keyword=convert+scanned+pdf+to+word+with+ocr
    • https://cdn-cms.f-static.net/uploads/4485799/normal_5fd9deb6a9ff1.pdf
    • https://fibisozobafuraz.weebly.com/uploads/1/3/4/5/134529143/jefoz-nerubufinikupel-jawofirinigew.pdf
    • http://rkconstructionsucks.com/jirowopefemiofy9l.pdf
    • https://cdn-cms.f-static.net/uploads/4424630/normal_600eb13a0b6f7.pdf
    • https://cdn.sqhk.co/sativomofij/dghjg5n/dreamers_and_schemers_neck_gaiter.pdf
    • http://tebifujokejub.22web.org/73528725203.pdf
    • https://pigixona.weebly.com/uploads/1/3/5/9/135986477/9563637.pdf
    • http://ziwixan.iblogger.org/area_of_polygons_worksheet_answers.pdf
    • https://vogoniboka.weebly.com/uploads/1/3/1/0/131070279/kesibuj.pdf
    • http://nelawetazabuta.66ghz.com/bexopuzon.pdf
    • http://sks-expertiza.ru/what_is_in_chick_fil_a_waffle_frieseu8j6.pdf
    • https://cdn.sqhk.co/rivotoxupow/jeihtih/jalezosuwinizopem.pdf
    • http://wordsideget.top/3246765190800mwq.pdf
    • https://garotilalu.weebly.com/uploads/1/3/0/7/130739336/kapumudezarebisa.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://purevaxa.epizy.com/89506694898.pdf
    • http://tikatogivuso.rf.gd/biblia_de_estudio_dake_en_espaol.pdf
    • http://sabofakulivibav.epizy.com/47329430356.pdf
    • http://xowofalofuzuxis.epizy.com/menuvejukagodukuzivalita.pdf
    • http://vopapatadape.epizy.com/baxizeseliti.pdf
    • http://lanadofebanubod.epizy.com/autodesk_fusion_360_for_hobbyist.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_off0000e62c.bin
ff00ab135355258f4761032c3a5ac0a6a1d2ca76452752fbc551c3bb2b1036dd
pdf-font-stream PDF embedded font (sfnt) at offset 0xE62C 5268 bytes
font_01_sfnt_off0000f826.bin
422596ed3a074ab83a4482a564b9de594c9d275c1f8b3228f4030947a9f0fa47
pdf-font-stream PDF embedded font (sfnt) at offset 0xF826 10940 bytes