Malicious PDF — malware analysis report

Static analysis result for SHA-256 863912f7b40527d8…

MALICIOUS

PDF

88.5 KB Created: 2021-02-26 00:57:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cdc7326f9fee450aa95d39afafb7a04c SHA-1: 0bcb5d0c81c7d7e4354fd56ecd1576488d750179 SHA-256: 863912f7b40527d88971ddcfe96911ebec1cf5adb9053f16f854dd23d27dbb7d
96 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to a suspicious domain, likely intended to deliver a payload or phish for credentials. The document body, though heavily obfuscated, suggests a lure related to 'molarity practice problems worksheet answers'. No scripts were extracted, but the PDF structure and embedded URI strongly suggest it's a malicious document.

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://bologen.ru/wix?keyword=molarity+practice+problems+worksheet+answers
    • https://cdn.sqhk.co/latosagax/ghSjijj/unofficial_companions_for_cyberpunk_2077.pdf
    • http://scandisvet.ru/ads_b_flight_tracker_app_iosjg9dz.pdf
    • https://cdn.sqhk.co/naveropifo/avE4jiu/giwebekiv.pdf
    • https://cdn.sqhk.co/pugijuzo/jaicyig/36442068355.pdf
    • http://julubavixukab.66ghz.com/can_you_buy_starbucks_mugs_online.pdf
    • http://winsbig.space/best_bodyweight_exercise_app_android35fut.pdf
    • http://yewes.space/20048959482hn9ln.pdf
    • https://cdn.sqhk.co/nanijamu/jgOhiG9/16063861209.pdf
    • http://copyright-securityx.com/texifatokagatupozijisoncixfd.pdf
    • http://savadaqwe.space/armor_stand_for_minecraft_pel7sxv.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://rokefobititu.epizy.com/kofewebopenoben.pdf
    • https://s3.amazonaws.com/xazarujokemus/gugokido.pdf
    • http://nojatajof.rf.gd/werezipipixizi.pdf
    • https://s3.amazonaws.com/purufiz/41314381601.pdf
    • https://s3.amazonaws.com/xamibudasagas/50829769827.pdf
    • http://gaxapokone.epizy.com/roliruvegux.pdf
    • https://s3.amazonaws.com/vasofirida/gewida.pdf
    • http://puligop.epizy.com/functional_training.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_off000118a4.bin
0d3458b8da364b2f7697b1c1dbd889e83c5c39060cb22eaad89ce5dbd2488560		 pdf-font-stream PDF embedded font (sfnt) at offset 0x118A4 5576 bytes
font_01_sfnt_off00012b89.bin
e92177ed2af0b743ed8a5ae607d844bc4c8b97e532b7b9929692291809dd8449		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12B89 12420 bytes

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