Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbda251769376bb7…

MALICIOUS

PDF

75.9 KB Created: 2021-03-17 20:14:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 17749d7c19f18b488d085b891ea2f45f SHA-1: 291c0eae037c7b699877ebc4947ac1be7087db1a SHA-256: bbda251769376bb7603838ed537981807d42f0c641341e5bad256e80decb44f9
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 heuristics indicating the presence of external URIs and embedded URLs. The document body, though heavily obfuscated, suggests a lure related to '1000 common english sentences pdf'. The embedded URLs likely serve as phishing links or downloaders for further malicious payloads.

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://bologen.ru/award?keyword=1000+common+english+sentences+pdf
    • https://cdn.sqhk.co/jidulopavoji/ibHbawr/arcade1up_pacman_with_riser_and_stool.pdf
    • https://cdn.sqhk.co/vefuwebilux/jRheeig/father_sons_discount_code.pdf
    • http://nagesebaz.iblogger.org/ios_11_theme_for_iphone_5c.pdf
    • https://melusibisi.weebly.com/uploads/1/3/4/5/134595399/411d2fd9abdf.pdf
    • http://sekujirimabasas.getenjoyment.net/keto_diet_plan_south_africa.pdf
    • http://jiguvesowa.22web.org/easy_recipes_for_beginners_vegetarian.pdf
    • http://vodabutopidaru.getenjoyment.net/30061995311.pdf
    • https://zizavoxepob.weebly.com/uploads/1/3/4/4/134479394/2fa0bb87ea7f39.pdf
    • https://cdn.sqhk.co/nimabugokofa/Oj0mieJ/xalunifaremujewuliniguf.pdf
    • https://cdn.sqhk.co/texojijoraso/34ijjdo/piano_tiles_alan_walker_dj_mod_apk.pdf
    • https://futokodoneru.weebly.com/uploads/1/3/0/8/130814407/gawarimevap-tozufaz.pdf
    • https://cdn.sqhk.co/vikojovowoso/aZFjcja/tinubewuvupivin.pdf
    • http://jarisudowapebi.sportsontheweb.net/electrical_engineering_mcq_free_download.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://tosipasakuvil.myartsonline.com/25463487980.pdf
    • https://s3.amazonaws.com/jeworurowam/159558900.pdf
    • http://zakivijojinikij.epizy.com/fisetilazudunobeji.pdf
    • https://s3.amazonaws.com/lijopavexanuse/pemixamajuti.pdf
    • https://s3.amazonaws.com/sulasatevirexo/fodegomizoga.pdf
    • https://s3.amazonaws.com/wuniku/bidivetigugofitegemus.pdf
    • http://tefetuzuzip.myartsonline.com/hp_officejet_8600_printer_price.pdf
    • http://zotubune.myartsonline.com/20829382436.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_off0000ec63.bin
92c4f508e737d18718ebf7042e0f716279e312dd46f9263aa91e1dac57449b32
pdf-font-stream PDF embedded font (sfnt) at offset 0xEC63 5364 bytes
font_01_sfnt_off0000fe87.bin
27b4c0f2be553f48065200702231af0865aedbd43513c7ac27afa7d50f4bc4c9
pdf-font-stream PDF embedded font (sfnt) at offset 0xFE87 10596 bytes