Malicious PDF — malware analysis report

Static analysis result for SHA-256 d91b8b4e556d53d7…

MALICIOUS

PDF

82.5 KB Created: 2021-03-27 20:01:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 0d9426277f6fcb3ecbf6f943e48066c4 SHA-1: 9fa628c5ad8d9fb70f42fadb7ea63645c7fda08d SHA-256: d91b8b4e556d53d78cb0d374d3bf70bbc79d28082e1876ef7118885d4458eb4f
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 0.9957

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://gimoguvi.ru/wix?keyword=mascoutah+boy+scout+troop+57 PDF link annotation
    • http://lozhobelir.space/45398041489pnkr4.pdfIn PDF document text
    • http://cmb-accueil.com/61700449738wesqi.pdfIn PDF document text
    • http://item-mask.top/tigalofpof0.pdfIn PDF document text
    • http://businesslinecenter.com/pazabuxesizdft9s.pdfIn PDF document text
    • http://micrometerdigital.xyz/181306117232fcb6.pdfIn PDF document text
    • http://yesnutural.space/169889459541wk0y.pdfIn PDF document text
    • http://keto-menu.online/novugelasajufisopumimobisg8avi.pdfIn PDF document text
    • http://ekzo-fruit.ru/giwukerebuwesirkau3o.pdfIn PDF document text
    • http://jijimaxugixu.22web.org/10524269481.pdfIn PDF document text
    • https://cdn.sqhk.co/viwedanej/eaalBUO/your_environment_includes_which_of_the_following.pdfIn PDF document text
    • http://xuvivok.22web.org/classroom_rules_free.pdfIn PDF document text
    • https://cdn.sqhk.co/mevexobuzur/DhjA5gf/the_elder_scrolls_legends_cards.pdfIn PDF document text
    • http://apelsins.space/android_simple_notification_example_stackoverflowbuf0c.pdfIn PDF document text
    • https://cdn.sqhk.co/sigidezok/7gfahdI/78854638610.pdfIn PDF document text
    • https://cdn.sqhk.co/xovepejegosi/rgZZhgy/14630152437.pdfIn PDF document text
    • http://santaparker.store/dukeloxtuilj.pdfIn PDF document text
    • https://cdn.sqhk.co/gujadozede/Ajhujcm/m64plus_fz_emulator_uptodown.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cf21b241-1edd-4e7a-8b85-4b7fa12bec5a.filesusr.com/ugd/835652_d668995950b44a5a8efd943820c106ad.pdf?index=trueIn PDF document text
    • http://mutodavop.rf.gd/domogizejunibikuzib.pdfIn PDF document text
    • https://s3.amazonaws.com/badodemebo/49657967663.pdfIn PDF document text
    • https://s3.amazonaws.com/dukexajuj/international_business_the_challenges_of_globalization.pdfIn PDF document text
    • https://9849c7ec-8b19-4b81-9a64-db2537ea7c40.filesusr.com/ugd/97b1c0_565830c2d0364aaf87af865d03788398.pdf?index=trueIn PDF document text
    • http://turekepopede.rf.gd/death_note_light_up_the_new_world_novel.pdfIn PDF document text
    • https://5c817321-7c0c-448b-959d-deb1da9fd788.filesusr.com/ugd/19103d_6109183f4a08496db0df8a1c20db8cc6.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rurosaveruk/the_andromeda_strain_2008_full_movie_download.pdfIn PDF document text
    • https://19f621d4-ab03-49b5-bf1d-c78de40104d4.filesusr.com/ugd/bc84a3_b78c079511e24c5a899d65ea01d201b6.pdf?index=trueIn PDF document text
    • http://vujesidewu.rf.gd/pivewurikog.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_off00010264.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10264 5440 bytes
SHA-256: 01bceed3bd82a918e7462ffa82482e6b781dafa9e64f8d8de1c6303784ddc839
font_01_sfnt_off000114f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114F8 11424 bytes
SHA-256: c42f526ce8eb64af986c9945c34e62efbe7768e968fb70691b22e0b12ea5b01b

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