Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1cda6492f474f59…

MALICIOUS

PDF

75.6 KB Created: 2021-03-13 14:15:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c59890f6b2160400d56e8dbd2bc11fad SHA-1: 5535d8af9279eccddcb8cf11f530e4213cb30090 SHA-256: a1cda6492f474f592dc309d2d403bec336000f972e169a2e46bf511739670f24
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, and numerous other URLs are present within the document, suggesting a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains keywords related to microplastics, likely used as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://botokaw.ru/award?keyword=microplasticos+en+humanos+pdf
    • http://tifowudadu.22web.org/nesasomufexisozugevo.pdf
    • https://cdn.sqhk.co/jesisoritet/8ayhsy1/78327980135.pdf
    • http://love-cosmetics.shop/worx_landroid_review_ukkshvs.pdf
    • http://urott-hu.com/the_heavenly_man_paul_hattawaym2lib.pdf
    • https://pemogele.weebly.com/uploads/1/3/5/3/135324676/zelogefad.pdf
    • https://cdn.sqhk.co/nejajevafode/hdKhfV7/ruwibolep.pdf
    • https://cdn.sqhk.co/mejofiwog/gjeUii4/monster_energy_supercross_game.pdf
    • http://vuzetasavuxoso.mygamesonline.org/milubalikezugeparimaw.pdf
    • http://rusherx.studio/common_nouns_with_answerss8a41.pdf
    • http://vomamafawib.scienceontheweb.net/how_to_adjust_thermostat_on_electric_water_heater.pdf
    • http://women-ita.space/gta_v_failed_zlib_callxtzd1.pdf
    • http://funasowuto.getenjoyment.net/how_to_replace_eureka_vacuum_bag.pdf
    • https://zozutogumudeke.weebly.com/uploads/1/3/4/4/134440166/tevefekiwixur.pdf
    • https://cdn.sqhk.co/xomatujod/xghFyh7/flip_phone_smartphone_razr.pdf
    • http://kubisobej.22web.org/bemugolijo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://pujumek.myartsonline.com/redezuzesezujalorawajameg.pdf
    • http://kijilari.epizy.com/xepageloxuj.pdf
    • http://doritiwenoxa.onlinewebshop.net/dafuv.pdf
    • https://0c7ecde5-8d52-4b6d-bf00-bcb9beb5fd3c.filesusr.com/ugd/b6f5a5_15697172c6cc45588519bb2e994ab7e1.pdf?index=true
    • http://mogadaf.epizy.com/52179027729.pdf
    • https://3857ddc0-2b33-46ba-b4a8-ebef9b167687.filesusr.com/ugd/5cc0d5_8c2231083c1346ccb8b90ea5aead2ae8.pdf?index=true
    • https://a1359116-1358-4cde-afc5-3600b4bb50db.filesusr.com/ugd/3b0c81_a3b586c5b8574ffbbe38af8c9f7c11bb.pdf?index=true
    • 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_off0000e5ce.bin
0d3b5e6a2f173cd37fe350ee5c274212835c9ab0004d1ecc4909d77f4fcefdd5
pdf-font-stream PDF embedded font (sfnt) at offset 0xE5CE 5400 bytes
font_01_sfnt_off0000f806.bin
6e7e6409ad24a43d98f34da6afc8322bc996adef285b43c20258a7d0be7c9d4c
pdf-font-stream PDF embedded font (sfnt) at offset 0xF806 11896 bytes