Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9fff6826198c1e2…

MALICIOUS

PDF

90.2 KB Created: 2021-03-09 14:40:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 4ca98c33ec497dec9eef0e8f4d2278d3 SHA-1: ab3d86f85d9df2a14bccf69a8c585b719881c256 SHA-256: e9fff6826198c1e2fbea360cd04bbd486ac3c177e552d30831499967026ee3f1
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a high ML score and ClamAV detection for phishing and trojan activity. The document contains numerous embedded URLs pointing to disposable domains and link farms, indicating a likely attempt to redirect users to malicious sites. While no scripts were directly extracted, the PDF structure and URL patterns are consistent with phishing lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://fokemale.ru/award?keyword=alta+via+delle+dolomiti+1+pdf PDF link annotation
    • https://cdn.sqhk.co/nuzitomizaj/bANheha/monster_dash_song.pdfIn PDF document text
    • http://edalovert.xyz/sezimaphtfdz.pdfIn PDF document text
    • https://cdn.sqhk.co/sozodumupof/iigia4J/83714081957.pdfIn PDF document text
    • http://phtech.site/98597860511u5slz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385198/normal_600ff5cccf41a.pdfIn PDF document text
    • http://pop-marketplace.ru/werilt8hur.pdfIn PDF document text
    • https://cdn.sqhk.co/baxoladipezu/jdbEw0P/serig.pdfIn PDF document text
    • http://lyudi23.ru/list_of_feelings_and_emotions_with_pictures7z8vd.pdfIn PDF document text
    • http://svoylend.xyz/book_of_enoch_giants_heightdu6dx.pdfIn PDF document text
    • https://cdn.sqhk.co/fazituku/bghUhjc/radiation_absorption_definition_chemistry.pdfIn PDF document text
    • https://cdn.sqhk.co/vigamodijek/ijKhijg/tenaza.pdfIn PDF document text
    • http://coins24h.com/652571314wtmqw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375350/normal_5fdbe42a093d6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485818/normal_5fd0e6b4356f9.pdfIn PDF document text
    • http://drnextact.xyz/70945523062al0jh.pdfIn PDF document text
    • http://how2clever.com/xegapipogudumizik650i7.pdfIn PDF document text
    • http://teachost.com/keto_summit_free_cookbook_reviewuemu6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://01c4c9a3-ee74-4db9-a65d-799443b8dbf1.filesusr.com/ugd/a64c8c_5c41d0ef26aa485d9557a6ac8223b095.pdf?index=trueIn PDF document text
    • https://a540aa65-2eb1-4ac3-86d0-bf6a54daac96.filesusr.com/ugd/2d797c_743329377b974a3b94463db33e3d0b8d.pdf?index=trueIn PDF document text
    • https://c18d7360-3707-4bf1-9d6f-52ba7510fa17.filesusr.com/ugd/76cb06_299646e105d14608b320a968da388a3f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sigobija/amazon_quiz_contest_today_answer_win_50000.pdfIn PDF document text
    • https://s3.amazonaws.com/likerajatob/school_year_calendar_excel_template.pdfIn PDF document text
    • https://s3.amazonaws.com/kofabube/maxab.pdfIn PDF document text
    • https://s3.amazonaws.com/kegubinefuda/is_a_mustang_gt_reliable.pdfIn PDF document text
    • https://74269c25-1731-4359-90d4-804f54ef9c1c.filesusr.com/ugd/b5973a_48b409c88be947baa269528914482cf7.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gapivegek/used_lexus_rx_350l_for_sale_by_owner_near_me.pdfIn PDF document text
    • https://5c817321-7c0c-448b-959d-deb1da9fd788.filesusr.com/ugd/19103d_6b84b75a92cd4722b099ce7dc0d79c6a.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_off00012412.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12412 5016 bytes
SHA-256: 5bf4b62d8faf0e456b1112f93885fe5584fe6a89a54a17b384642ab3ea7177c6
font_01_sfnt_off0001352a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1352A 11808 bytes
SHA-256: 8e750d8961964a91bfaf5bb564f48fb5a6fd6cbc10bc8fda0b6bb7e5ab1dd0ed