Malicious PDF — malware analysis report

Static analysis result for SHA-256 33e87ea87a95766c…

MALICIOUS

PDF

70.9 KB Created: 2021-02-15 03:01:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: eab7bcbb276c3cb287efb74cc720a0b4 SHA-1: b2089f5c3adaec3575cac431566b0b45bb9477c9 SHA-256: 33e87ea87a95766cdac2060c6545fd52b6954d994c1f1750ee7d2f01e5a1612d
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file is identified as malicious by multiple heuristics and an ML classifier, specifically flagged as a phishing trojan. It functions as a link farm, containing numerous external URLs pointing to other PDF documents hosted on various domains, suggesting an attempt to manipulate search engine results or distribute further malicious content. The presence of many distinct hosts and links per host indicates a coordinated effort for SEO spam or a broad distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://seumenha.ru/wix?keyword=monodrone+stat+block PDF link annotation
    • https://putigored.weebly.com/uploads/1/3/0/7/130738503/5444663.pdfIn PDF document text
    • https://lorerepurukese.weebly.com/uploads/1/3/1/4/131453396/9159314.pdfIn PDF document text
    • https://gufofusubovara.weebly.com/uploads/1/3/5/3/135323195/femiwedu.pdfIn PDF document text
    • https://denuxikunoleluj.weebly.com/uploads/1/3/4/0/134018299/208836ac99.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402533/normal_5fee72bf4e279.pdfIn PDF document text
    • https://bodonoweti.weebly.com/uploads/1/3/1/8/131856710/vofijux.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413966/normal_5fcd27773c28e.pdfIn PDF document text
    • https://vozozexofevufut.weebly.com/uploads/1/3/1/8/131871902/2956785.pdfIn PDF document text
    • http://all-casino.xyz/cake_decorating_lessons_online2qpp6.pdfIn PDF document text
    • https://lerizizevu.weebly.com/uploads/1/3/4/3/134314130/1939471.pdfIn PDF document text
    • https://dalatomim.weebly.com/uploads/1/3/4/3/134344090/dexaf-ramofoji-tamagexexojopi.pdfIn PDF document text
    • http://callipakk2.site/74456253911m93j6.pdfIn PDF document text
    • http://flylovel.com/xam_idea_accountancy_class_12_solutionsfw6z1.pdfIn PDF document text
    • http://front-glass.website/yamaha_a_s301_reviewep08b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/kufazete/chaalbaaz_movie_song_with_dj.pdfIn PDF document text
    • https://s3.amazonaws.com/mamukawaxatali/android_auto_in_nederland_2019.pdfIn PDF document text
    • http://takefaluzimun.rf.gd/lake_erie_steelhead_fishing_guides.pdfIn PDF document text
    • https://s3.amazonaws.com/sazixipame/font_awesome_5_cheat_sheet.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_off0000d7bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7BD 5144 bytes
SHA-256: 517a44498b50c6463b35162527eef4f5d03126caafafe7b5330113ddaf3d00c8
font_01_sfnt_off0000e953.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE953 11084 bytes
SHA-256: cc941eb9bf2161e2d8e59ebf8e58599161726e3fbe9f2049910662128b785275

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