Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d0164443a1eeb44…

MALICIOUS

PDF

85.8 KB Created: 2021-06-30 23:48:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 39448c34e816d0482ab67d7228567555 SHA-1: d641f90db1e44b3a9b3d365b9acb578971204fa7 SHA-256: 2d0164443a1eeb4488a3fee7f9fef680ca177e60758a39b862d9d4a2a66ae89d
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised WordPress upload storage and other disposable hosting, suggesting it functions as a link farm to distribute malicious content or phish users. The presence of these links and the overall structure strongly suggest an attempt to redirect users to harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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 http://jointrilogy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a79064f1fa2---wewerijiwatafi.pdf
    • http://phillipsbricksalumni.com/clients/56168/File/26327829109.pdf
    • http://15889163.com/ckupload/files/botube.pdf
    • https://humantouchtranslations.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/1607773fa95892---29335827277.pdf
    • https://www.femregenx.co.za/wp-content/plugins/super-forms/uploads/php/files/hb7th78kimrgb5cgv8atn5j97s/zikugobirinixatilogu.pdf
    • https://www.ideaklinik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fa3ee98bbd---lekuvezebufokikotuxatukix.pdf
    • https://indiantalentjunction.com/milan/media/majedeganu.pdf
    • http://alphabodysupplements.com/newerac2c/userfiles/file/kiwemuje.pdf
    • https://sharzh-ufa.ru/wp-content/plugins/super-forms/uploads/php/files/f97ed94da4632b4650d09c99422f446e/98092067750.pdf
    • http://bochosushi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f4d6d7e99c---7015641749.pdf
    • http://nsfeed.com/_UploadFile/Images/file/wozufizufufikixigiju.pdf
    • https://amirep.com/wp-content/plugins/super-forms/uploads/php/files/b5ed6ac33be090d551990d80b8d0e98d/figevewokimepitisazum.pdf
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/pf4v5l7d9g2n9r2b3t8ulid2sm/71881562589.pdf
    • https://www.nosolodespedidas.es/wp-content/plugins/formcraft/file-upload/server/content/files/1609023d18f28b---fajezijevijexavosavozokok.pdf
    • https://www.wflorlando.com/wp-content/plugins/super-forms/uploads/php/files/88a0769192a8d85967af83c01ce0157d/22472562473.pdf
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/1a73f200dfaecca48abb5e8a4b3c7b86/zemavivukuferifikat.pdf
    • https://www.lorenzofranzone.it/wp-content/plugins/super-forms/uploads/php/files/d9d77d4d95c86afc295c0b5ae46207f2/31770517464.pdf
    • https://autopratichesas.it/file/tolizutosejuraralujuv.pdf
    • http://bindashnews.com/userfiles/file/11515945587.pdf
    • https://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/16098d4e9e8571---95076432765.pdf
    • http://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/160cf78948adef---39491791403.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=a+planning+process+for+middle+sized+projects+reading+answers
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed3d.bin
324752a6a454ff2cf39a164f023e9d6245e2b696cd7b9fd223f210145288f0d8
pdf-font-stream PDF embedded font (sfnt) at offset 0xED3D 11220 bytes
font_01_sfnt_off0001075e.bin
4e00c8f0e295e2d75cb88e7e0fdce3af3944b9bd915639d5e1fc2c369f0f34d6
pdf-font-stream PDF embedded font (sfnt) at offset 0x1075E 16208 bytes
font_02_sfnt_off0001315e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1315E 16792 bytes