Malicious PDF — malware analysis report

Static analysis result for SHA-256 19ef9e279c6f0bce…

MALICIOUS

PDF

76.8 KB Created: 2021-04-24 22:42:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c7e0eb26a43773c8e44733e7ce498a48 SHA-1: 425d13149cdf7e39d9164634fc1567a2585876ec SHA-256: 19ef9e279c6f0bceda9a8703941fcfed1b34bbaa63f178090d8c53eb94483943
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document body, though heavily obfuscated, contains text related to connecting a Bluetooth speaker, which serves as a lure. The presence of multiple embedded URLs, including 'https://zajinet.ru/strik?utm_term=how+to+connect+merkury+bluetooth+speaker', suggests these are used for phishing or to download further malicious content.

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://zajinet.ru/strik?utm_term=how+to+connect+merkury+bluetooth+speaker
    • https://cdn.sqhk.co/vowibesep/iblhhgg/rorufem.pdf
    • https://lowunipuso.weebly.com/uploads/1/3/1/4/131453219/5893740.pdf
    • https://cdn.sqhk.co/gakilofod/U4iajhZ/nolidedifixurevitevoferi.pdf
    • http://luvatok.66ghz.com/comet_cable_gland_catalogue.pdf
    • http://kibasemenatax.22web.org/taziwefiwifu.pdf
    • http://zufabud.22web.org/recent_banking_awareness_questions.pdf
    • https://cdn.sqhk.co/wukatigubo/GLyjbib/extreme_landings_game_mod_apk.pdf
    • https://porovepo.weebly.com/uploads/1/3/4/5/134527374/80de43a42e550b4.pdf
    • http://kidepokapila.22web.org/murevefunegigadive.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/904b152d-c0c4-4082-b6bf-5407b173511d/nivikelev.pdf
    • http://kexojobozajase.rf.gd/47314459010.pdf
    • https://uploads.strikinglycdn.com/files/f90fdb65-d524-414f-87c4-2dd5be5aec24/how_to_make_cool_easy_paper_planes.pdf
    • http://wivonubezur.epizy.com/joker_harley_quinn_hd_wallpaper.pdf
    • https://uploads.strikinglycdn.com/files/c2035864-4b8f-4ba1-9d52-7029f1b56898/kojixupagasolavofekunaz.pdf
    • https://uploads.strikinglycdn.com/files/d607229f-6efe-4404-9e7b-2a45e898a649/fozarosegakawup.pdf
    • https://s3.amazonaws.com/xakajoziwibi/laws_of_exponents_and_scientific_notation_worksheets.pdf
    • http://kowesodi.rf.gd/jexanasidukolofatifawe.pdf
    • https://s3.amazonaws.com/bidurudilidujug/bededepidomalifi.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_off0000ee0e.bin
ab8c6b5603cb368c4402cd1c0b4519ad04269539eebe2aa67a69bc64d45d8655
pdf-font-stream PDF embedded font (sfnt) at offset 0xEE0E 5532 bytes
font_01_sfnt_off000100c3.bin
a24ba29e03d53d0b3fe3443d5241409b3c519b9eb5ab338a9cdc824d7e278c11
pdf-font-stream PDF embedded font (sfnt) at offset 0x100C3 10752 bytes