Malicious PDF — malware analysis report

Static analysis result for SHA-256 e179cecda930dced…

MALICIOUS

PDF

88.3 KB Created: 2021-03-17 20:19:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: e8ebc26b02722f4341a06852129f70b0 SHA-1: 5cffc4fc77582015e81b81ea595e874823f9d54b SHA-256: e179cecda930dcedf4ce76707a59312b2d20d57171bd78b79debed1f054ed379
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 0.9997

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://xezojetit.ru/wix?keyword=epic+combo+unblocked+333 PDF link annotation
    • http://1xbet-regi.site/vasapuqck3e.pdfIn PDF document text
    • https://cdn.sqhk.co/fogunivugame/GjbhhGc/chennai_express_video_songs_in_tamil.pdfIn PDF document text
    • http://shoop-fo.ru/supreme_duelist_stickman_mod_apk_homemir4u.pdfIn PDF document text
    • https://cdn.sqhk.co/tuwagezo/jduBKhd/towovejemiwemubufamonoza.pdfIn PDF document text
    • http://zedukibawubige.22web.org/shiva_cartoon_movie_full_hd.pdfIn PDF document text
    • http://everydays.space/review_dometic_ice_boxsf9sc.pdfIn PDF document text
    • http://myfavoritesun.xyz/literature_review_on_theories_of_behaviour_changeqtd1c.pdfIn PDF document text
    • https://cdn.sqhk.co/bizujutenifo/1hcy30s/simplifying_algebraic_expressions_worksheet_with_answers.pdfIn PDF document text
    • http://strahuemsya.info/162940136106h6xq.pdfIn PDF document text
    • http://jemulobapamiwu.mywebcommunity.org/17113893814.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kaloruligot.onlinewebshop.net/nutrition_sportive_musculation.pdfIn PDF document text
    • http://tumizasikoxef.rf.gd/23399539926.pdfIn PDF document text
    • http://mudotepejix.epizy.com/89185757957.pdfIn PDF document text
    • http://zezilometup.epizy.com/tuxiroxugefetufeveduno.pdfIn PDF document text
    • http://zivumimilalak.rf.gd/ijazat_hai_full_audio_song.pdfIn PDF document text
    • https://s3.amazonaws.com/muxozuvalubi/automatic_star_delta_starter_circuit_diagram.pdfIn PDF document text
    • https://s3.amazonaws.com/mizeteb/nibalorajuvo.pdfIn PDF document text
    • https://s3.amazonaws.com/dazinibonofobi/vebibirefobonazorav.pdfIn PDF document text
    • https://s3.amazonaws.com/resixexi/26627723984.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn 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_off00010949.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10949 6744 bytes
SHA-256: 0eac1552a6a0cc8d6d43e14f5c157d052ff2bf21460314f67a2c213e0a454e63
font_01_sfnt_off00011a30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A30 5060 bytes
SHA-256: 9fff46185a47b6abf8015580493c0b319bc2543c2b0a081cb35344c87f7d8e4d
font_02_sfnt_off00012b5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B5A 12060 bytes
SHA-256: 1f22f6c2e5902c7445f871b3b25bee496c9d47394be040c3b1ccd77995c61c63

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