Malicious PDF — malware analysis report

Static analysis result for SHA-256 46e6219ad22bacb0…

MALICIOUS

PDF

61.8 KB Created: 2021-02-11 21:41:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: cb469bf909afa6bb00710c5afd70c79b SHA-1: 009a2bd0c454075195f3ea5ff05492b0c433e1f5 SHA-256: 46e6219ad22bacb0df0c5fd03673ce57be44a7543ce004cef8793f8d23bc6876
126 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. It contains numerous embedded URLs, with one specifically pointing to 'bologen.ru' and another to 'dontbeshy.xyz', suggesting a phishing or malware distribution scheme. The document body, though heavily obfuscated, appears to be a lure related to 'economic indicators worksheet answers'. No scripts were extracted, but the PDF structure and embedded URIs strongly suggest it's part of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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=economic+indicators+worksheet+answers PDF link annotation
    • http://dontbeshy.xyz/gajuteganopukubejelisn6slk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454559/normal_600b1fda5d174.pdfIn PDF document text
    • http://100p-f.ru/wortox_guide_dst28hx0.pdfIn PDF document text
    • http://gomuleg.22web.org/ayatul_kursi_transliteration_english.pdfIn PDF document text
    • http://ig-objectionform.com/warrior_mindset_bookr2hva.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391047/normal_5fd3320719b6e.pdfIn PDF document text
    • http://faceit.su/yo_yo_ho_ho_retro_platformer_apkw5u5z.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446174/normal_5fef038b81abb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412996/normal_60256487b31cf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369638/normal_5fd673e94f8b1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369519/normal_5ff109a3be1fd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4499636/normal_6008f38fe5fe7.pdfIn PDF document text
    • http://golivexi.22web.org/xumezafawinixumor.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365635/normal_5fda955ab8a2e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dagogedimin.rf.gd/uc_browser_2019_apk.pdfIn PDF document text
    • http://bujixexugezudu.rf.gd/assembly_language_programming_8051.pdfIn PDF document text
    • https://s3.amazonaws.com/gumegulaxi/70731571134.pdfIn PDF document text
    • http://dobubijopawuxon.epizy.com/adobe_premiere_logo_animation_templates.pdfIn PDF document text
    • http://dilizefolu.rf.gd/phpspreadsheet_header_image.pdfIn PDF document text
    • http://faxaxesaxejov.rf.gd/android_one_special_features.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b983.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB983 5260 bytes
SHA-256: a4f695ad718d21554d0f0ccd5024829034ffd1bb5a9c8ee69c1cdec38c4bc8cf
font_01_sfnt_off0000cb4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB4E 8920 bytes
SHA-256: 2b7b7fe57a23d8ad3c6f4cd50ea9d0632dd1ffe1cefb46632ff0fb29f2a454c8

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