Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f80a40a72d877bc…

MALICIOUS

PDF

78.9 KB Created: 2021-05-10 12:55:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 2a1bef5643e6feef9c59adef982ed45d SHA-1: 912087595f778f1cb5421b9797bf7f10c384868d SHA-256: 0f80a40a72d877bc8f9f96f01c055abfb15b8d147d2abf282918455996829bfb
186 Risk Score

Malware Insights

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

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 0.9990

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://leonvi.ru/strik?utm_term=walk+behind+power+rake+rental+near+me PDF link annotation
    • https://cdn.sqhk.co/dexizajifu/gdsKoRq/asteroid_hitting_earth_nov_2nd.pdfIn PDF document text
    • https://cdn.sqhk.co/godereliku/fCL3hhg/37142621448.pdfIn PDF document text
    • http://igme.site/16294850737511jr.pdfIn PDF document text
    • http://khareedforosh.com/ashrae_refrigeration_handbook_downloads0wac.pdfIn PDF document text
    • https://cdn.sqhk.co/sarafogu/fiyqDjf/jedidotudisag.pdfIn PDF document text
    • https://cdn.sqhk.co/lizupasepafu/RIlen6g/8998818127.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4529149/normal_6007b471bd496.pdfIn PDF document text
    • https://sixapinipuso.weebly.com/uploads/1/3/1/3/131384402/1735864.pdfIn PDF document text
    • https://cdn.sqhk.co/domuduxuro/jhtv6ji/70001304384.pdfIn PDF document text
    • https://cdn.sqhk.co/pugepavofu/Tjbja0o/music_video_maker_online.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385631/normal_60090263ce061.pdfIn PDF document text
    • http://form-lnstagramcopyrightservices.com/lit_term_examples6g6tv.pdfIn PDF document text
    • https://cdn.sqhk.co/jukusenefow/ifhiFGU/american_football_games_live_online_free.pdfIn PDF document text
    • https://cdn.sqhk.co/bigulikexupa/jdMZwQE/combat_shooting_games_online_free.pdfIn PDF document text
    • http://creditscoretracking.info/fabuzimomagurinuludajexaptq1i.pdfIn PDF document text
    • https://cdn.sqhk.co/pememobuwir/Hb2gdib/56492544318.pdfIn PDF document text
    • https://tematurulabi.weebly.com/uploads/1/3/1/6/131606540/mowowepe-koxif-wigimereja-kagiguniru.pdfIn PDF document text
    • http://dsv-trening.ru/angle_of_elevation_and_depression_worksheet_3zjvy9.pdfIn PDF document text
    • https://cdn.sqhk.co/zoxowowi/ibPhjii/mobile_number_locator_call_blocker.pdfIn PDF document text
    • https://lefatelaxebaj.weebly.com/uploads/1/3/5/3/135398996/pudiwe.pdfIn PDF document text
    • https://tumotasefon.weebly.com/uploads/1/3/5/3/135317172/f05113.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/didowugorokirug/estimate_quotients_using_compatible_numbers_worksheet_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/wifiduxezo/asus_support_centre.pdfIn PDF document text
    • https://s3.amazonaws.com/vetamedisoz/76762117252.pdfIn PDF document text
    • https://s3.amazonaws.com/rodakarugupoko/oracle_bpel_12c_developer_guide.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_off0000f5a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5A4 5332 bytes
SHA-256: 47f92a6563fb33468888fc0579282bb540d7e76372b2d3cbad061eeb7b87d08d
font_01_sfnt_off000107a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107A9 11160 bytes
SHA-256: 5d7308b3d662f705fedb355ee33d7773e93234e45829d448df6f3cfec7a22e50