Malicious PDF — malware analysis report

Static analysis result for SHA-256 36e8cef2452dbb41…

MALICIOUS

PDF

66.7 KB Created: 2021-03-06 07:57:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 743dbd32fcb247b2132066cb72a40afb SHA-1: 7dc1167061193ccca3f8b2aa622a2542ed53c025 SHA-256: 36e8cef2452dbb4144562cab267902239c8d9a789084a055b85f36873c726a14
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 'https://zajinet.ru/wix?keyword=pryor+public+schools+mt', which is likely a phishing or malware distribution lure. The document body, though heavily obfuscated, contains references to the URL, reinforcing its role in the attack.

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://zajinet.ru/wix?keyword=pryor+public+schools+mt
    • http://kalidejomepajo.scienceontheweb.net/toxamefegofipuge.pdf
    • https://cdn.sqhk.co/kewusikata/gfTidjq/the_walking_dead_season_1_game_parents_guide.pdf
    • https://jovegubegatok.weebly.com/uploads/1/3/5/3/135318826/zomujerug.pdf
    • https://sadusobagobazep.weebly.com/uploads/1/3/0/7/130776682/zivabipuw-zujanebezidi-katufap-pixanujiv.pdf
    • https://cdn-cms.f-static.net/uploads/4416675/normal_60145261bfc4a.pdf
    • https://gubuwogufulero.weebly.com/uploads/1/3/4/6/134608521/zosotu-benivofupa-xegog.pdf
    • https://cdn-cms.f-static.net/uploads/4497369/normal_601cb182315bb.pdf
    • https://mozevosiku.weebly.com/uploads/1/3/3/9/133999333/210418.pdf
    • https://static.s123-cdn-static.com/uploads/4460970/normal_5fcea51694a11.pdf
    • https://cdn-cms.f-static.net/uploads/4477138/normal_603b519f668cb.pdf
    • https://loloxemevo.weebly.com/uploads/1/3/0/7/130739498/1588338.pdf
    • https://cdn.sqhk.co/jeporikate/ajdlija/mowonemexoditimud.pdf
    • https://static.s123-cdn-static.com/uploads/4365539/normal_5ff527a87e605.pdf
    • https://cdn.sqhk.co/gawagunikuw/gjUpje7/lesesevagonunekofowudewi.pdf
    • https://cdn-cms.f-static.net/uploads/4426966/normal_60390372230df.pdf
    • https://cdn-cms.f-static.net/uploads/4369158/normal_5fd9a59a68811.pdf
    • https://cdn-cms.f-static.net/uploads/4454161/normal_600acd3158965.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://soranodabiwegi.myartsonline.com/75061639080.pdf
    • http://weparaxopulo.atwebpages.com/jiradasazizox.pdf
    • http://wogirajixamaw.epizy.com/fapejiruxonatilibeji.pdf
    • http://lipabarud.atwebpages.com/lord_of_the_flies_film_characters.pdf
    • http://xovajiw.rf.gd/1032054350.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_off0000c810.bin
05036fe73d32e8c55fe436733457bc531c8fe44396d7da0773fbc9e3f8ea2839
pdf-font-stream PDF embedded font (sfnt) at offset 0xC810 5204 bytes
font_01_sfnt_off0000d9a4.bin
34fab42585d30ac15a8b394593f3aecd03a99c32f3be3ad74840293f9ed72188
pdf-font-stream PDF embedded font (sfnt) at offset 0xD9A4 10520 bytes