Malicious PDF — malware analysis report

Static analysis result for SHA-256 ffcc466ddbe428d3…

MALICIOUS

PDF

83.8 KB Created: 2021-04-19 10:20:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 0f87b85001c24ec529ef200f81fc648d SHA-1: 671dc41a135d07c9fc2105e50a1f3444a52674dd SHA-256: ffcc466ddbe428d30c5fc96dd363726ea7c38577ab8076821ae466ca6a6935ca
126 Risk Score

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 0.9950

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=canonet+ql17+giii+lens+cap PDF link annotation
    • https://cdn.sqhk.co/mobixipotex/LhiVhXh/pattern_lock_screen_apk.pdfIn PDF document text
    • http://cparta.moscow/defedivuvx1e.pdfIn PDF document text
    • https://cdn.sqhk.co/rifusofuwedi/9jijnib/ronofatigasasawugalazi.pdfIn PDF document text
    • http://msertis.xyz/binizuweluvekumin1uwf.pdfIn PDF document text
    • http://montana-media.com/what_are_good_topics_for_a_research_proposalq7oe6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426695/normal_6025058f380e7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459028/normal_6048cffc09a84.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458829/normal_603fcdc36bf35.pdfIn PDF document text
    • http://in-arenas.com/29676727981ihn9b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415936/normal_5feb49171df96.pdfIn PDF document text
    • http://medyayazilimtr.com/56521203154ov54l.pdfIn PDF document text
    • http://lightly.store/should_heater_be_on_or_auto212nc.pdfIn PDF document text
    • http://sfr-webmail.com/boat_racing_games_free_downloadmb8o4.pdfIn PDF document text
    • http://carinsusa.info/spectrum_math_workbook_grade_8_free92cvz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495849/normal_6000b8f9b6975.pdfIn PDF document text
    • http://devicesprotectionforusers.site/why_does_my_kenmore_dryer_squeaky4nr3.pdfIn PDF document text
    • https://cdn.sqhk.co/tivuzofep/ZQ5tXG8/fenatedinevejakarunis.pdfIn PDF document text
    • https://cdn.sqhk.co/budajawisore/Wgnjj6Y/susosunebufub.pdfIn PDF document text
    • http://qupieasy.online/nonaxl6pxo.pdfIn PDF document text
    • https://cdn.sqhk.co/nazabimon/dTificJ/45279837860.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/gomakobez/61366383923.pdfIn PDF document text
    • https://34ec465e-51aa-4dba-9a8c-c05fcfb5ae84.filesusr.com/ugd/df15ee_072f683058bb432dac61db870552e336.pdf?index=trueIn PDF document text
    • https://506dbbd1-d4b3-44b1-a4c9-6b5d0cab6a23.filesusr.com/ugd/c75f60_64b7c27b325b4a3f807a1b4c9340acba.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/votawawo/ssc_chsl_2018_question_paper.pdfIn PDF document text
    • https://s3.amazonaws.com/xopugup/67733865654.pdfIn PDF document text
    • https://s3.amazonaws.com/winumigutam/jotewajibogobarig.pdfIn PDF document text
    • https://s3.amazonaws.com/juvuraguvutoxif/vetewedotuligadej.pdfIn PDF document text
    • https://cda84be5-0c54-4c05-8389-97bb004c798d.filesusr.com/ugd/fa9f00_67ad051d0d4d4aa2a8c68a0b1b3232f0.pdf?index=trueIn 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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f4cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4CB 5168 bytes
SHA-256: 27aafa14868265d8a21a1e13b3e98cd5de7fc3cf5b3aee8c13fa8ebc0e119fd3
font_01_sfnt_off00010689.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10689 11040 bytes
SHA-256: 97cfe7a99b0fb18ca16df8405cde9e86097d170d3f9f3be886f2a28cb60f9b69
font_02_sfnt_off00012c39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C39 16204 bytes
SHA-256: e93acd332f5893643511f4cefd38969ad5c744ad1b08842a788b6be7d277dd15