Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f72a59ae58944c3…

MALICIOUS

PDF

96.1 KB Created: 2021-03-31 18:58:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 04fb45a14349c1ed90036983e82f2156 SHA-1: 26836f081b150009d183e459912a0dd944d26b8c SHA-256: 7f72a59ae58944c3cc3842853de6b47a9095472eb1ffafac257852e6d4b4b3cb
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains and exhibiting link farm characteristics, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://midufefew.ru/wix?keyword=yugioh+duelist+of+the+roses+cheat+engine PDF link annotation
    • http://sellamorem.com/free_emotions_flashcards2ioep.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370299/normal_600987ddc99e5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386842/normal_60047fc619f0e.pdfIn PDF document text
    • http://infonewstravel.com/xabasiruvujifupugiofi45.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380531/normal_5fdcb5e8318f9.pdfIn PDF document text
    • http://bezigex.iblogger.org/factory_reset_android_in_chinese.pdfIn PDF document text
    • http://tonagruz.ru/love_photo_collage_editor_app_downloadjknxt.pdfIn PDF document text
    • http://pobijubak.iblogger.org/yokel_crossword_answer.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413967/normal_6047d21303ed9.pdfIn PDF document text
    • http://pemegira.22web.org/zagg_slim_book_go_keyboard_and_case_for_ipad_pro_11_black.pdfIn PDF document text
    • https://cdn.sqhk.co/javukapegami/he6ooia/minecraft_new_nintendo_3ds_edition_update_cia.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383571/normal_6034f462bc50c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496616/normal_602755981fe99.pdfIn PDF document text
    • http://muzoc.xyz/manualidades_para_navidad_nios_preescolar8nfk8.pdfIn PDF document text
    • https://cdn.sqhk.co/dewufidabo/oOjcibm/mississippi_state_parks_open.pdfIn PDF document text
    • http://garantiya62.ru/8598371256840lt0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://bagozorox.rf.gd/46581071936.pdfIn PDF document text
    • https://s3.amazonaws.com/jenagubadopi/lowewat.pdfIn PDF document text
    • https://s3.amazonaws.com/nodetuxapabara/pujizenu.pdfIn PDF document text
    • https://s3.amazonaws.com/zonebon/250_gr_de_harina_en_ml.pdfIn PDF document text
    • https://s3.amazonaws.com/sezebepit/simple_invoice_template_graphic_design.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012e4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E4D 5128 bytes
SHA-256: a03ec102acd7a5691ea035bb359fdc280cc4a0db02b5c7838f1fa367a8642194
font_01_sfnt_off00013faf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13FAF 10964 bytes
SHA-256: 1e3f60e887e3d8cdce5895e3bee8a5e1cb2d3a75de60a2fddcc4586d31ba85fb
font_02_sfnt_off000164cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x164CC 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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