Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e7184feb79d6225…

MALICIOUS

PDF

90.9 KB Created: 2021-03-16 01:01:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 1d5107f04ed705687c4fd64f54c4bafd SHA-1: 376c5d37cb0c21737f02313b5622012fbf8b6c75 SHA-256: 0e7184feb79d62254849408a79a9869d1bf9e2b1a6a22cb2a3cd06e228d6e2b0
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many pointing to disposable hosting, suggesting a link farm or phishing lure. The document body, though heavily obfuscated, contains keywords related to exercises and PDF, likely a pretext to disguise the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://xezojetit.ru/wix?keyword=joining+sentences+exercises+with+answers+pdf PDF link annotation
    • https://cdn.sqhk.co/pojimisuso/bAjgPt6/83957832458.pdfIn PDF document text
    • http://mazipuvaxa.mywebcommunity.org/materi_argentometri.pdfIn PDF document text
    • http://zekoselu.22web.org/alan_wake_soundtrack.pdfIn PDF document text
    • http://zobebukore.22web.org/primal_define_language.pdfIn PDF document text
    • http://pofevezale.22web.org/kibodabivoditanivakaxakep.pdfIn PDF document text
    • http://joteruzawareba.iblogger.org/vunupupu.pdfIn PDF document text
    • http://kolagozisil.mywebcommunity.org/39001911249.pdfIn PDF document text
    • https://cdn.sqhk.co/muxuzoxipopa/lggjcwS/crony_capitalism_meaning_in_english.pdfIn PDF document text
    • http://lojapidabud.mypressonline.com/can_i_drive_with_my_permit_to_work.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://doriponesarom.myartsonline.com/how_to_unlock_a_tracfone_samsung_j3_luna_pro.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d844d44-349b-477a-942b-89e3eb168938/wizukiduxofiluvexaloje.pdfIn PDF document text
    • https://07d68bf2-0661-47e2-9ffe-eae068a071af.filesusr.com/ugd/fef806_1c118dd344f74b98bd890d123013e662.pdf?index=trueIn PDF document text
    • https://dae57379-2785-4108-a223-4562ecbfc22e.filesusr.com/ugd/87ad98_d4da5ebd9951405091acacb0668b00af.pdf?index=trueIn PDF document text
    • https://b70645e9-42d7-44c6-80f2-f165c8819e8d.filesusr.com/ugd/3f1130_08923438475142019dbb400faf546f81.pdf?index=trueIn PDF document text
    • http://gozotonitiki.epizy.com/kawizizarukijukedetumugi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/48b4ca1c-1012-4c6f-a986-c94eb92977c3/3396013004.pdfIn PDF document text
    • http://sevixazoma.rf.gd/venatusaboji.pdfIn PDF document text
    • http://makuvekate.rf.gd/twenty_thousand_leagues_under_the_sea_quotes_with_page_numbers.pdfIn PDF document text
    • https://c2bc7a71-cb21-434c-84f6-8d2fc09ed56d.filesusr.com/ugd/03ae60_95a0235efaed4cef93c8e7db16a658ac.pdf?index=trueIn PDF document text
    • https://caa91486-5fcc-43b7-8b2b-5b817ae85bbe.filesusr.com/ugd/26bbcf_0b809bb4c8884af8b0c9c4504aa733b8.pdf?index=trueIn PDF document text
    • http://saxodanokijaj.atwebpages.com/astrology_book_in_bengali_download.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_off0001185c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1185C 5320 bytes
SHA-256: fe560dfb9f68867d9cd2ae35f13e51b1cf3c1e4b36e4ba7031b62f5f3d2a2bfd
font_01_sfnt_off00012a7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A7C 10968 bytes
SHA-256: 817d9ee9f28bcced87a722c97de914ffffe9fadd3559e1f55d16ece5a811e543
font_02_sfnt_off00014fcd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14FCD 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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