Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ed3b7fe2944bbb6…

MALICIOUS

PDF

95.7 KB Created: 2021-04-27 12:45:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 3dbc93d6296ef0602343cc22b278ff58 SHA-1: b156a2ea9df4623d3f5d0521a483938fdcad1fa6 SHA-256: 4ed3b7fe2944bbb653ba498dc49fe8fcc4069f609bbbeeb3c271821f326dad36
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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 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://ponafet.ru/strik?utm_term=the+rising+of+the+shield+hero+episodes+season+2 PDF link annotation
    • http://juwijosij.iblogger.org/minajekegimogofuk.pdfIn PDF document text
    • https://wunaramalus.weebly.com/uploads/1/3/4/5/134576193/b3938b0.pdfIn PDF document text
    • https://mizugoveram.weebly.com/uploads/1/3/3/9/133986338/39140638c17.pdfIn PDF document text
    • https://guxenakab.weebly.com/uploads/1/3/5/3/135393472/zuzozexekaj.pdfIn PDF document text
    • https://cdn.sqhk.co/kokowoxiwi/413idmL/free_video_calling_apps_for_laptop.pdfIn PDF document text
    • https://cdn.sqhk.co/bivuwusim/ijNgdgc/marvel_unlimited_cost_uk.pdfIn PDF document text
    • https://kufojomarolov.weebly.com/uploads/1/3/4/4/134401526/ruxapo-nosovupifegi.pdfIn PDF document text
    • https://cdn.sqhk.co/tavedikovo/gh2Svic/super_mario_world_map_1_theme.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed28e091-fb66-46c1-a69d-f176fa5f7642/design_and_control_of_concrete_mixtures_16th_edition_2016.pdfIn PDF document text
    • https://s3.amazonaws.com/wonumafubij/platform_translation_in_marathi.pdfIn PDF document text
    • http://puzexexaniledow.epizy.com/bise_lahore_1st_year_2019_date_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/zebarufuridorur/non_terminals_in_cfg.pdfIn PDF document text
    • http://kixepuvun.epizy.com/25279298711.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef2cb399-b635-4085-9349-bf268507ad48/free_storyboard_tool_online.pdfIn PDF document text
    • https://s3.amazonaws.com/lanorolowu/ativador_do_office_2013.pdfIn PDF document text
    • http://giwoxig.rf.gd/40149087570.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c3d0a14-60bd-4080-bacf-11659217ed65/39636059990.pdfIn PDF document text
    • http://wigegamumuxan.rf.gd/navedorivikuvedafasegejo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/31c1bfcc-907f-44d6-8d84-e1ac05e07f90/busilebefemuxas.pdfIn PDF document text
    • http://bifutebapeji.epizy.com/mekanisme_kerja_atropin_sulfat.pdfIn PDF document text
    • http://jogirifikisimub.epizy.com/vive_l_alimentation_ctogne.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB2A 25244 bytes
SHA-256: 2f2a549e9b60256f72ed4f7950e1efc8d89ab60b69d68448edcadd224c669363
font_01_sfnt_off000139d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139D2 5384 bytes
SHA-256: 43e8874408f6c34d7b8c78ab700f8051c77caa223a92fba06e1958d0adf6dece
font_02_sfnt_off00014c16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14C16 10904 bytes
SHA-256: b90f8f83e441bf1cd5f6c05e47d9f39dd2f0dd09fbaaf8fd0c2b9f9343b11d76

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