Malicious PDF — malware analysis report

Static analysis result for SHA-256 367afb38472bb526…

MALICIOUS

PDF

82.2 KB Created: 2021-07-01 13:28:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f53e00c8e2a7df63775d6cb295134dba SHA-1: 50b50f8796db112023d49105b10d6a59fca1a2d1 SHA-256: 367afb38472bb52604da542adb8da504d0f8952a855ac620e0e780ab2580ff71
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised CMS upload directories or disposable hosting, indicating a link farm designed to redirect users. ClamAV and ML classifiers flagged this PDF as malicious, specifically as a phishing trojan. The presence of multiple external URIs and link farm heuristics strongly suggests an attempt to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://razvozka24.ru/wp-content/plugins/super-forms/uploads/php/files/a59bab8c8a87b241401597722c46dbd7/60605178405.pdf
    • http://the-bom.kr/upfile/files/37272556167.pdf
    • http://cerezolorente.com/files/cerezolorente/_repo/file/wivolexibovuxita.pdf
    • https://webtechnocrats.com/upload/file/romafuxuzu.pdf
    • http://warraichmeats.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078b78a9e78e---77930468695.pdf
    • https://drmarlenebothma.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160930607980e3---76127019002.pdf
    • https://www.keystonecare.co.uk/wp-content/plugins/super-forms/uploads/php/files/bf2660d3e2d4726aa99247f9f4bccf09/73168300408.pdf
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/1606d44ff28565---gaxorinizusup.pdf
    • https://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/32e70e3fb137775271d0aead55e7dd79/rufawekagubekerajogole.pdf
    • http://www.christinemartin.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16070b3415723f---xunute.pdf
    • https://readxyz.org/wp-content/plugins/super-forms/uploads/php/files/523a7323a88b3a73509e2687abdc8db6/rusunel.pdf
    • http://hoondb.com/wp-content/plugins/formcraft/file-upload/server/content/files/160777211cce30---mevezapexapanekobomeneku.pdf
    • https://earthideasawnings.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ccd274b58b0---zitojogovipojixoviz.pdf
    • http://barcelonasixtytwo.com/userfiles/file/lenaterezuvadot.pdf
    • https://indacphuc.com/wp-content/plugins/super-forms/uploads/php/files/e6tohogku95gpvn4r9ve1g0r57/63304165986.pdf
    • http://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072db6a910d9---dotowelawanotefizid.pdf
    • http://bhk-aindling.com/userfiles/files/12055727315.pdf
    • https://www.straightmyteeth.eu/wp-content/plugins/super-forms/uploads/php/files/97f2e15fc8ff626cd9f03922d8e1e389/9853884038.pdf
    • http://kondicionery-dolgoprudny.ru/upload_picture/file/vokox.pdf
    • https://atcotourismtravel.com/userfiles/file/69665898363.pdf
    • http://www.marcado.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608b53a3281ea---85246359493.pdf
    • https://rmissio.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160841e348c97f---jafeboteraris.pdf
    • http://zrdb-drogbud.pl/Upload/file/83882941919.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=best+defence+town+hall+8
    • 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_off0000dd7f.bin
a3ed19b88f832579447e1bee72c19bf8406fb1dbb8e1935a7966a584574bd4b8
pdf-font-stream PDF embedded font (sfnt) at offset 0xDD7F 10728 bytes
font_01_sfnt_off0000f63c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF63C 16792 bytes
font_02_sfnt_off00010e4e.bin
ee69f0d6cd4023c75a230f9dd7c9b1c2cae06e3df0828707b388cd6ab5fba5e3
pdf-font-stream PDF embedded font (sfnt) at offset 0x10E4E 17316 bytes