Malicious PDF — malware analysis report

Static analysis result for SHA-256 6003cc7d1662c046…

MALICIOUS

PDF

100.2 KB Created: 2021-08-01 12:30:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: dc70bf807d551e0428af7cc8e9fd83c3 SHA-1: 18f7c81d46e74aaf6ce42de98dc712a0cb8298b2 SHA-256: 6003cc7d1662c0467bb4e68480e6c1c0f6416b01952057d710c6664611190a73
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV. It contains a link farm pointing to multiple compromised WordPress sites, specifically utilizing the formcraft plugin for file uploads. The presence of numerous distinct hosts and the 'utm_term_redirector' flag suggest a phishing or malware distribution attempt. No scripts were extracted, and the document body was unreadable, but the heuristic findings strongly indicate a malicious link farm.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9929

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://www.microsinusectomi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f08b64746f---30244907767.pdf In PDF document text
    • http://i-daa-wl.de/userfiles/lamogafaxobabu.pdfIn PDF document text
    • http://dmkert.hu/files/file/49221202326.pdfIn PDF document text
    • http://healthywithhart.com/res/file/70240288507.pdfIn PDF document text
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abf1577f67a---65152022408.pdfIn PDF document text
    • http://sosonomo.com/ckfinder/userfiles/files/xapunulelejakagorelujuga.pdfIn PDF document text
    • https://daynexweb.com/upload/ckfinder/files/38346316403.pdfIn PDF document text
    • http://nhaphangmy.us/upload/files/24428167532.pdfIn PDF document text
    • http://piri-piri.pl/ckfinder/userfiles/files/vukiwijuxuxofolilutaf.pdfIn PDF document text
    • https://tvmreza.tv/ckfinder/userfiles/files/gefajedawakides.pdfIn PDF document text
    • https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e083928534---gomuboteguw.pdfIn PDF document text
    • http://instant-image.net/UserFiles/Site/File/nigijasoto.pdfIn PDF document text
    • https://matfplayer.com/calisma2/files/uploads/zafekinemotudajoziko.pdfIn PDF document text
    • https://www.mybizwebsites.com/wp-content/plugins/formcraft/file-upload/server/content/files/16102491ae7876---binopelima.pdfIn PDF document text
    • http://www.putnamtaxi.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607aff41da2e9---sukodekerotomuzukude.pdfIn PDF document text
    • https://rockyshairsalon.com/wp-content/plugins/super-forms/uploads/php/files/iqjudlhv0jv5e8ie1eo65aobdb/segemeral.pdfIn PDF document text
    • https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160bd1d4d0aa55---80790137169.pdfIn PDF document text
    • https://khanikango.in/file/joviz.pdfIn PDF document text
    • https://claphamjunction.com.au/wp-content/plugins/super-forms/uploads/php/files/5982c7da57e9556f319fd06c946810ae/pavajuxusexirisikoki.pdfIn PDF document text
    • https://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609d062a64d38---guzirozusazebisuxef.pdfIn PDF document text
    • https://hmjrgoldhockey.org/wp-content/plugins/super-forms/uploads/php/files/76d4f9c61f3fc254e94187f8adce944e/56272185228.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=escuchar+musica+de+brindis+mp3PDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000105e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105E4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011dfb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DFB 10908 bytes
SHA-256: 0c3c04e5237d333b0861b9cf5bb8da001dd87ae15edf1598d6169760a2ffffea
font_02_sfnt_off000136be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136BE 16944 bytes
SHA-256: ef0329dac4803480f2d6f4d9e9c4ba3aed2817dbf0857a17f9b8becfccd91a33
font_03_sfnt_off00014e0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14E0C 20560 bytes
SHA-256: 97f88ef7620463a50e90d3e9306b1c10df62611e579beeaa499d77e3a38c9d21

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