Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c6656bf82b2529d…

MALICIOUS

PDF

85.9 KB Created: 2021-03-28 05:56:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: ded848a59fa03a1ab6d11f0714f23085 SHA-1: c0db73c7543316384a3778d357eb8d064a44a34a SHA-256: 8c6656bf82b2529de0c940df72b77b1d41d658571fc843fae6bf245f1e0e9c0a
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 0.9985

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=does+sony+bravia+support+hdr10 PDF link annotation
    • http://lozomaneje.getenjoyment.net/why_is_my_comcast_router_blinking_green.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369914/normal_6009694b1faca.pdfIn PDF document text
    • https://cdn.sqhk.co/zapiseniw/gghbf2e/12948107295.pdfIn PDF document text
    • https://cdn.sqhk.co/sovokeduseb/khh1Dhg/meweb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375515/normal_602c762021c78.pdfIn PDF document text
    • https://cdn.sqhk.co/gopuxipo/jcNN5ha/basketball_doodle_hack.pdfIn PDF document text
    • https://cdn.sqhk.co/zodavujera/jjhbha7/lovudepilivewubilopa.pdfIn PDF document text
    • http://berozabekep.sportsontheweb.net/agile_project_management_handbook_version_2._0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417423/normal_5fe0fd1c156af.pdfIn PDF document text
    • https://cdn.sqhk.co/padasagam/Xuij97K/nurekumaxipidalitim.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493578/normal_5fe7212071556.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474448/normal_60241ab0b7024.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/wobuzisibal/62878372698.pdfIn PDF document text
    • https://s3.amazonaws.com/zizene/when_does_wu_tang_saga_come_back_on.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/618c089d-0fe1-4c6b-8ea1-220c5231cbf3/is_taco_seasoning_keto_friendly.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8f9213f-bbd4-4298-bbb3-abb488e5781f/69256428237.pdfIn PDF document text
    • http://fobegakolu.epizy.com/56108094883.pdfIn PDF document text
    • http://tedijafubivot.epizy.com/46446264892.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/61160690-628b-42ad-af58-a81aee5d8c53/tortilla_flat_audiobook.pdfIn PDF document text
    • https://s3.amazonaws.com/ligole/jingle_bell_carol_song_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/831d481d-effd-43e5-b82c-a0ba7de99f73/29924508161.pdfIn PDF document text
    • https://s3.amazonaws.com/wejuvono/81663854776.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/99fd8862-d6d8-41a8-b0a4-febddd200be0/what_is_the_next_series_after_warriors_the_new_prophecy.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f0ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0EE 2828 bytes
SHA-256: 2f32373152b86590eb5c993bf8dbb57d20fc33770b92bc1ec6b5fd985d660553
font_01_sfnt_off0000faf7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAF7 5508 bytes
SHA-256: 65754cd6472588584eb979202f5f681d90d255cec9ca590f6febef8677d04af7
font_02_sfnt_off00010dbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DBB 11088 bytes
SHA-256: bf15f6c8c23935f0ebf9c7ada6c414196f4d9d49aa2765fd83f360b2bc89a103
font_03_sfnt_off00013402.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13402 16144 bytes
SHA-256: 2a5f1667c2e343500efde63e3dd6a136498333968b1680966ac5eb34589f1174