Malicious PDF — malware analysis report

Static analysis result for SHA-256 adfea7352a32e492…

MALICIOUS

PDF

78.7 KB Created: 2021-03-31 19:36:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b230fabb5a532ae941955c638481ff2c SHA-1: e220f4e3ffd32e8c7a2c5c7f223ba48324cb6400 SHA-256: adfea7352a32e4924e85f418c18bb64ee0839436880e3cee653b0b5415c7236c
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many of which are part of a link farm designed to mimic search results for a popular book. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://dugedepap.ru/award?keyword=you+can+t+hurt+me+david+goggins+pdf
    • http://mojenisijita.mywebcommunity.org/paradise_lost_book_9_full_text.pdf
    • https://static.s123-cdn-static.com/uploads/4402712/normal_5fe19b3f56899.pdf
    • https://cdn-cms.f-static.net/uploads/4480905/normal_60561a92e8e88.pdf
    • https://cdn.sqhk.co/jasurisunav/aljj2PN/77181776678.pdf
    • https://cdn.sqhk.co/lolajelor/hf75qhe/knife_battle_apk_download_mod.pdf
    • https://cdn.sqhk.co/golomamone/fn0gdgh/aqua_park_darwin_water_slide_3ds.pdf
    • https://cdn-cms.f-static.net/uploads/4374540/normal_603552a0f1cc9.pdf
    • https://cdn.sqhk.co/lopijikuvi/ijgggjd/anemia_falciforme_dietoterapia.pdf
    • https://cdn-cms.f-static.net/uploads/4381320/normal_6029e306ada18.pdf
    • http://lorakuze.sportsontheweb.net/difference_between_assembler_and_compiler.pdf
    • https://cdn.sqhk.co/sugefixa/hghhhfs/block_hexa_puzzle_board_game.pdf
    • https://cdn-cms.f-static.net/uploads/4413122/normal_5fd3889672899.pdf
    • https://cdn.sqhk.co/melalisopapu/9jajhxU/subway_train_runner_2016.pdf
    • https://cdn-cms.f-static.net/uploads/4403563/normal_60336626ee098.pdf
    • https://cdn.sqhk.co/tisezalave/VJ9ih8w/menaladaponukaxodofane.pdf
    • https://cdn.sqhk.co/vitimosugu/NhhS05h/microgolfoven_aldi_2020.pdf
    • https://cdn.sqhk.co/nalomuxe/fogdjd2/kobutuzigasepiresil.pdf
    • https://cdn.sqhk.co/poronujefino/ajbgfkr/66041562983.pdf
    • https://static.s123-cdn-static.com/uploads/4423453/normal_5fc70cc107088.pdf
    • http://vufiwopader.medianewsonline.com/9563895481.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://gixiluvigatekij.atwebpages.com/79272589088.pdf
    • https://7292b199-6d7c-4e84-b646-7854114497ba.filesusr.com/ugd/53361e_99e09780c4b94999abc23625195018d9.pdf?index=true
    • https://4a1cfc67-5981-466d-a13b-75576fe7431f.filesusr.com/ugd/64e449_fbdda2c0c9b44a3e8f7534b0c58ea5a7.pdf?index=true
    • https://e809654a-a95b-4dbc-a338-24085255a2f8.filesusr.com/ugd/1b6cec_673c7f0884f04f29b12077f3fd769ee3.pdf?index=true
    • https://3c4962d9-41f7-4f14-8396-dad57cc8de20.filesusr.com/ugd/a2de88_3d35f4ff1cf84b7eab735df42f048707.pdf?index=true
    • https://2eeb51df-07ba-4372-80d9-1ef4646fc7f7.filesusr.com/ugd/6af210_8fe7d76170b14b96b8b4c8df94580554.pdf?index=true
    • 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_off0000f2b8.bin
6ce33315ba8df9e568d40cb93d7fe25d0e8265c42e01648ee74b63f2e725299b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF2B8 5556 bytes
font_01_sfnt_off0001057d.bin
849d71f012d32066496d0f948a7b303f857c4df52d6b51995ea76e80377d6040		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1057D 10952 bytes

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