Malicious PDF — malware analysis report

Static analysis result for SHA-256 4688f02c6157041e…

MALICIOUS

PDF

83.7 KB Created: 2021-03-30 08:02:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 8e971afe170e33985663fb85f4df2a07 SHA-1: 6485a5437924f13f459e3fec99d7896598963235 SHA-256: 4688f02c6157041e1aa9fc4311b9df5500f1989a920f3b0a4f78813a83f9b10d
186 Risk Score

Malware Insights

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

The PDF contains numerous external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of 'Percy Jackson pdf' in the document body and a URL indicates a lure to attract victims. ClamAV detection and ML classification confirm the malicious nature of the file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://nipisod.ru/wix?keyword=percy+jackson+pdf PDF link annotation
    • https://cdn.sqhk.co/nedovipirumu/v5jfhoj/15863064368.pdfIn PDF document text
    • https://cdn.sqhk.co/budufunewuf/p0MC0mQ/43112521928.pdfIn PDF document text
    • https://cdn.sqhk.co/bafebolabefo/PHMgihj/sushi_neko_menu_queen_creek.pdfIn PDF document text
    • https://cdn.sqhk.co/kinanunir/Egcijgj/nuwekeriperapivoweripanu.pdfIn PDF document text
    • https://cdn.sqhk.co/pigevikuwi/JhfjfsY/banco_bradesco_numero_telefone.pdfIn PDF document text
    • https://cdn.sqhk.co/derixosu/gdpibxo/kokejagujatizuxebov.pdfIn PDF document text
    • https://cdn.sqhk.co/mitukutowum/d2ewifm/rukekijagelafagodiv.pdfIn PDF document text
    • http://physcoo.com/in_the_end_mp3_download_320kbps_free_downloadbo9ve.pdfIn PDF document text
    • https://cdn.sqhk.co/tokarikadez/dhtjihj/63687425582.pdfIn PDF document text
    • https://cdn.sqhk.co/nowovadizeb/KXchjho/60292606609.pdfIn PDF document text
    • https://cdn.sqhk.co/kavuzoda/igieprC/20586293907.pdfIn PDF document text
    • http://lbaranaydin.com/sepetanovtlnvu.pdfIn PDF document text
    • https://cdn.sqhk.co/nowonipewo/iZjhd9V/piffle_dice_game.pdfIn PDF document text
    • https://cdn.sqhk.co/vipujitebiki/cGgf7if/chestburster_costume_homemade.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://6674166f-eb58-46b1-9d38-a528bc95e02c.filesusr.com/ugd/e38d8e_5413c733f67f43a89846d8e61f649c95.pdf?index=trueIn PDF document text
    • https://ce322291-b3da-4cc2-ae0f-523e25daec44.filesusr.com/ugd/4530da_3ba4a916acde4de18c756cf9e9cd5125.pdf?index=trueIn PDF document text
    • https://acfc0e76-311d-46af-9c13-f46c112eb424.filesusr.com/ugd/f90bad_e109b63f58b04c7b824b321accbeac02.pdf?index=trueIn PDF document text
    • https://31c8a3d4-0132-49f1-a04f-09c79d03e01f.filesusr.com/ugd/a4da84_1fd281c6245f49deb5a3890d8e4dbedd.pdf?index=trueIn PDF document text
    • https://aaf8962b-2ea5-4403-bfea-7c32f2b3f77e.filesusr.com/ugd/8f3a65_265064c76f604a32adf43c813d76be9b.pdf?index=trueIn PDF document text
    • https://4407eba0-147d-4e9d-98ff-19010b67f466.filesusr.com/ugd/c1f2fd_5c33cec976174d818264f58181183335.pdf?index=trueIn PDF document text
    • https://69a21580-3c80-4f81-8097-1ec0bc18215d.filesusr.com/ugd/bd7df1_ec1afcf84620433b88ea3f20de2801f7.pdf?index=trueIn PDF document text
    • https://ddd90330-5837-4e0c-b2f6-9383941cd2db.filesusr.com/ugd/568e2c_114e733868c0493b867c57d2a0e52826.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010934.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10934 5360 bytes
SHA-256: 8a24eaa2b7ac85d6d30c3dc2c633b28791711f63d15de8775ddf5143434c6c7b
font_01_sfnt_off00011b91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B91 11124 bytes
SHA-256: af3ff0e1fa1a01167e1141481d67bd4a016e400eb5504e07d82efa6968c01774