Malicious PDF — malware analysis report

Static analysis result for SHA-256 cab90222894b6ffc…

MALICIOUS

PDF

97.3 KB Created: 2021-03-11 13:45:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 7dbb9e74c500669e8f1410a29c21a997 SHA-1: e1d05fc07596aaa6c8d6201bd870f962d6f804cd SHA-256: cab90222894b6ffc1556b7670afa91738e70da1a340789d32f28874a54b85962
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 0.9946

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://jottigo.ru/strik?utm_term=dragalia+lost+fire+emblem+characters PDF link annotation
    • http://bonboxstudio.com/99193439586mdjg1.pdfIn PDF document text
    • https://cdn.sqhk.co/foradimotiri/jf1QgfJ/lujojerija.pdfIn PDF document text
    • http://webmastervlad.ru/english_communicative_class_7_answersxp1lp.pdfIn PDF document text
    • https://cdn.sqhk.co/wakewafo/ihbhjzB/home_design_3d_for_pc_online.pdfIn PDF document text
    • https://cdn.sqhk.co/xuzuvazol/HGxghpd/26306523761.pdfIn PDF document text
    • https://cdn.sqhk.co/jipogidara/3ig0Gjg/cube_tanks_blitz_war_3d.pdfIn PDF document text
    • http://amst-watch-v1.club/credit_agricole_cib_paris_annual_report_2017j8574.pdfIn PDF document text
    • https://cdn.sqhk.co/figakeves/hVjjge1/85352313329.pdfIn PDF document text
    • http://ppl-nutrshopfit.website/369153179452iwnc.pdfIn PDF document text
    • http://iglivesupportteam.com/todivalomegekedijoxtvs0u.pdfIn PDF document text
    • https://cdn.sqhk.co/lesasafo/gQPcctJ/mountaineering_gear_nz.pdfIn PDF document text
    • http://study-english-04.space/34828735125e0k6n.pdfIn PDF document text
    • https://cdn.sqhk.co/budajawisore/twgiE5R/86781637045.pdfIn PDF document text
    • https://cdn.sqhk.co/valujoper/jbhbigV/zukisive.pdfIn PDF document text
    • https://cdn.sqhk.co/moxasapiwer/Dtsiehj/66874789954.pdfIn PDF document text
    • http://koolmaxt.online/fesogegoraxesodiselesuqlg40.pdfIn PDF document text
    • http://domen3.club/59394191785fjomy.pdfIn PDF document text
    • https://cdn.sqhk.co/libewepigux/5jeihlP/dig_deep_brewing_co._cumberland_events.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://2b81f3f0-3f46-42ff-87a7-5865dd96cd3c.filesusr.com/ugd/fb41f9_c135b6dfdf874a02b0a6c44bd4b9cea3.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/2feacfbd-3668-4611-8ff5-9ca9331c8908/troy_bilt_riding_lawn_mower_belt_replacement.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b2f0326f-98d0-40dc-b7f8-e13022c7720d/how_to_search_in_google_by_photo_in_phone.pdfIn PDF document text
    • https://c7fb3737-a2fb-4e06-b71d-f78b648bb0a4.filesusr.com/ugd/a9248e_57af816989c24adaaec5d25210cc0f10.pdf?index=trueIn PDF document text
    • https://9579f988-9383-433c-acf3-5fff76e0c882.filesusr.com/ugd/191a6d_77f916001a1e466f819da354ade0faec.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a0f0f7bb-9cbb-4453-ab11-0d12825497f6/13435181066.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5391e5b8-65dd-4eca-a5b8-156d2db65367/fololulipavofusegimires.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/92ced6e9-347f-454b-b1c7-befd4ffd658f/85866141688.pdfIn PDF document text
    • https://f13dd0f9-fe0a-4257-a88d-d9af1a1cf0e3.filesusr.com/ugd/d954c5_cb100ef93da142de8d2dc07e42580bb4.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_off000128dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128DC 5436 bytes
SHA-256: 42ecf4b3463c6bda289ff81ea632601475685f8de561ee4cddc42f16f8507bb8
font_01_sfnt_off00013b37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B37 11668 bytes
SHA-256: 648514b621e00bfb6dcda5a392c5c317d5312859f6f405bdd63e9fe7f1cb8994
font_02_sfnt_off00016241.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16241 16092 bytes
SHA-256: 39b2f4b99ee08965fd4836f89f628a00cde8346cb181131bba0308e80db8fb67