Malicious PDF — malware analysis report

Static analysis result for SHA-256 eea941939fce9710…

MALICIOUS

PDF

107.1 KB Created: 2021-08-01 16:01:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 598bd8dafa36e79e3e8bf23e529503ab SHA-1: cd3248c0b37a854e71cfd12ffb729bdb6ed5fd8f SHA-256: eea941939fce97103e4be6afc887ebb1f9fa2016719b7142297341d8c7926064
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, with numerous URLs pointing to compromised WordPress uploads and disposable hosting. These links are likely designed to redirect the user to phishing sites or download further malware, aligning with a spearphishing attachment attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://parcfamilyreunion.com/clients/b/b3/b3ae52aef0329bb57e848b27182677c8/File/kejele.pdf In PDF document text
    • http://stylist.in.ua/wp-content/plugins/formcraft/file-upload/server/content/files/1606f49117ceed---96923788707.pdfIn PDF document text
    • https://www.chortho.co.uk/wp-content/plugins/super-forms/uploads/php/files/k7mqssp24suslt8paagjcrdh7s/44087426848.pdfIn PDF document text
    • http://poddertradingandindustries.com/userfiles/file/54312567114.pdfIn PDF document text
    • http://analogsys.com/uploaded/file/1194148422608ce6af41ecf.pdfIn PDF document text
    • https://buddingheights.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b5957704301---liwuwoxakuw.pdfIn PDF document text
    • http://asirius.su/wp-content/plugins/super-forms/uploads/php/files/2e33812d71a1363a9efaa54227b82f74/sigogesuletojudoboxixowut.pdfIn PDF document text
    • https://visaonline-vn.com/wp-content/plugins/super-forms/uploads/php/files/ff2qddcr2f5vjsr8k7hlg3472g/98595380198.pdfIn PDF document text
    • https://charterboatdeliverance.com/uploads/files/72131868164.pdfIn PDF document text
    • https://www.sudburyhighspeedinternet.ca/wp-content/plugins/super-forms/uploads/php/files/edf3fd1973bf087750c10087f9525ffa/32839510173.pdfIn PDF document text
    • http://pvsystreports.com/wp-content/plugins/super-forms/uploads/php/files/pgohm86hfplepjit04lttn2nn6/79106695084.pdfIn PDF document text
    • http://gdwtechnology.com/fckeditor/file/vugeti.pdfIn PDF document text
    • https://puppometalli.eu/file/gugoxalin.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/2ol7v8m99emj1fgh4keiedgqqf/342433923.pdfIn PDF document text
    • http://madiran-cruduparadis.fr/ckfinder/userfiles/files/narojinaw.pdfIn PDF document text
    • http://fogathajtohirek.hu/fckfiles/file/funetekuzurupabidemelubo.pdfIn PDF document text
    • https://www.paparazzirestaurant.com.au/wp-content/plugins/super-forms/uploads/php/files/23008173b0901cad0a77a7a20c42ac2f/77423100117.pdfIn PDF document text
    • http://miamiwars.pl/wp-content/plugins/super-forms/uploads/php/files/4937f6ef3adf5d491b47eb1a8602e866/72020224342.pdfIn PDF document text
    • https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609730ef3f648---dugapazemedawe.pdfIn PDF document text
    • https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c1488b0d8ad---88872527335.pdfIn PDF document text
    • http://xn--k1akb4c.xn--p1ai/userfiles/file/potamukitudazusukumerukov.pdfIn PDF document text
    • https://duext.com/wp-content/plugins/super-forms/uploads/php/files/8d7122776a809f54959b8b35d6be130f/fadukowut.pdfIn PDF document text
    • http://chocolatycakes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cbc67b788e---fibowavadajezuzubad.pdfIn PDF document text
    • https://pmfegypt.com/userfiles/files/26706222624.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=borg+warner+35+service+manualPDF link annotation
    • 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000122d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122D9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00013aeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13AEB 18704 bytes
SHA-256: d0d87a6b616638332074e28d4bbcd1e9b118b7b6c72fa6c815f25513bf6a07ed
font_02_sfnt_off00016ca8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16CA8 11084 bytes
SHA-256: 3abe55f572dd009a35ff2fd00627be9f1319da6d0589d21664aa6133a6ea051c
font_03_sfnt_off00018699.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18699 16644 bytes
SHA-256: 4213b6d034df0846a7c620edf4edac0278e02a66a7dadf26874541117a8e8d00

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