Malicious PDF — malware analysis report

Static analysis result for SHA-256 01498e6768a6a223…

MALICIOUS

PDF

109.8 KB Created: 2021-07-01 12:21:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 637b825686a3c8ea8534ca8c473f33e5 SHA-1: 79befbf9d4f9a1444d8d24b21acb00ea3fabb017 SHA-256: 01498e6768a6a223c76274a654bb511f713ac5c08ae555390a8ee2aac2819717
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external links, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm or phishing lure. The presence of PDF_URI and PDF_SEO_DISPOSABLE_LINK_FARM heuristics further supports this, indicating the PDF's primary function is to redirect users to potentially harmful external content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9868

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 https://allytemp.ru/uplcv?utm_term=sworn+statement+army+example
    • https://www.kcequipment.com.au/wp-content/plugins/super-forms/uploads/php/files/ec141bd8e2e83244307472aeefb62e9f/vaveluxokuxolavobozupemis.pdf
    • http://tpokebar.com/uploads/files/mapamojise.pdf
    • https://sf-tfi-pgu.uz/wp-content/plugins/super-forms/uploads/php/files/9fbc20a9479361bd9706fcf3904834ad/magomupulotula.pdf
    • http://roycraft.ca/userfiles/file/bubekuxiwuwer.pdf
    • http://sarljarry.fr/userfiles/file/23326513236.pdf
    • https://amagi.la/wp-content/plugins/formcraft/file-upload/server/content/files/16076c150474dd---linodijutudeb.pdf
    • https://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d91b566faf0---vajitorasegotawelij.pdf
    • https://functionalmovement.gr/wp-content/plugins/super-forms/uploads/php/files/d4635aa4d987536b9c7d5a6713e59193/41765707592.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f675550670---muwimexazamanefe.pdf
    • https://rmdschoolandcollege.com/wp-content/plugins/super-forms/uploads/php/files/d4c1nf2q1hu2rqeiunuceggr15/nonusojupupusoxekuten.pdf
    • https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/2fd0a630951798604edfe0b67e5094d3/47172719341.pdf
    • http://www.consorcio.edu.pe/wp-content/plugins/formcraft/file-upload/server/content/files/1609afe62d6079---dikejarusowopusu.pdf
    • https://centrorevisionimonregalese.it/file/67151458315.pdf
    • http://a1-automotivegroup.com/upload/files/95990823411.pdf
    • http://emurus.jp/userfiles/file/gegalijovuzivakoka.pdf
    • http://pc75.net/upfiles/file/1624686735.pdf
    • https://takiminsahada.com/wp-content/plugins/super-forms/uploads/php/files/4ngbnne4e1rpvl6er4pjko91vi/pujuxos.pdf
    • https://mamo-tato.ro/userfiles/file/litesejudaramor.pdf
    • http://www.benvenutialmare.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cb67b2ed0a---93143106674.pdf
    • http://es-umzuege-transporte.de/wp-content/plugins/super-forms/uploads/php/files/d5b6966c26775468218dd64198f81eec/nasujuvoruf.pdf
    • http://friluftsgruppen.se/wp-content/plugins/formcraft/file-upload/server/content/files/160be447b173e3---lakubegimexemute.pdf
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/160921d4148d15---sexamopujijexusosubozu.pdf
    • http://ahkjt.com/upfile/file/xajur.pdf
    • http://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16079f1f1365fd---sarigaweve.pdf
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000133cb.bin
5b09c6ec9402407eab3c9cdaca5bcf3124dfa82c74645dbff82a35d493d567d7
pdf-font-stream PDF embedded font (sfnt) at offset 0x133CB 17944 bytes
font_01_sfnt_off00016317.bin
00b1f632e8afe72716c8bcdb76b7901b56c060d1dc0f96f3f5c1b8373b85735b
pdf-font-stream PDF embedded font (sfnt) at offset 0x16317 16140 bytes
font_02_sfnt_off00017894.bin
018fe66051afb673add4d832bb45d986f9b8ebc98a4ed8b45066f39b18b4fee3
pdf-font-stream PDF embedded font (sfnt) at offset 0x17894 10700 bytes
font_03_sfnt_off00019142.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x19142 16792 bytes