Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e5672d98800b606…

MALICIOUS

PDF

105.0 KB Created: 2021-08-08 08:04:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 32a516f9a19fe22dff9ac7158f0bb4cf SHA-1: 40d84f00074bd28d577a9466519da3aeb9d33b74 SHA-256: 5e5672d98800b606d0a9b66d5afa24b14ecb594ae51f76102aec250d47fb5f6f
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to compromised WordPress upload directories, suggesting it is part of a phishing or malware distribution campaign. The ML classifier and ClamAV detection strongly indicate malicious intent. The document's structure and embedded URLs point towards a lure designed to redirect users to malicious content hosted on compromised sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9874

Heuristics 7

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://pankalconstructora.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607377832e72b---56922962141.pdf In PDF document text
    • https://suhrsmad.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1609733a2cdc83---28198704154.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c418359e039---boxibuselaf.pdfIn PDF document text
    • https://bevelec.com/bevelec/dossierMois/file/40559193240.pdfIn PDF document text
    • http://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afdbb6e1e49---vevarikafazo.pdfIn PDF document text
    • http://banghetretruc.com/media/ftp/file/danitefefilosinateduro.pdfIn PDF document text
    • http://stlukesmn.org/clients/17773/File/sitisogitowivuko.pdfIn PDF document text
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a0de5836a4---11352329834.pdfIn PDF document text
    • http://iwish-cosmetics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e5a2bf413f---5345360341.pdfIn PDF document text
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16089420c401fb---71282081587.pdfIn PDF document text
    • http://kpghomerepairs.com/uploads/image/files/detariwotedisiloxez.pdfIn PDF document text
    • https://ontime-taxi.kg/wp-content/plugins/super-forms/uploads/php/files/d4e0dac761d83e061a83bc3be4e38fad/34553094773.pdfIn PDF document text
    • http://worksafeorg.com/wp-content/plugins/super-forms/uploads/php/files/hlkirg9gq9pol3c3fjh4psfpe0/gogisefufisela.pdfIn PDF document text
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/phf6f7ck1ukdi0jj84vkvaorcj/fibumore.pdfIn PDF document text
    • http://thegioidahoacuong.com/uploads/image/files/80050120551.pdfIn PDF document text
    • https://xn--nmqu14inmf.com/upload/files/15040404336.pdfIn PDF document text
    • https://tort-art.ru/userfiles/file/89771734728.pdfIn PDF document text
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3fe08ce609---vazozajafogolowogiwapubes.pdfIn PDF document text
    • http://moestuinwebshop.nl/userfiles/file/tovazo.pdfIn PDF document text
    • http://hong-tour.com/FileData/ckfinder/files/20210702_8BCF9E1D2B833D98.pdfIn PDF document text
    • https://www.colours-of.com/wp-content/plugins/super-forms/uploads/php/files/6p2qn77s33g0qv5iee3e8ncu2u/fiwomamosejakidunutitoj.pdfIn PDF document text
    • http://bud-drog.pl/userfiles/file/92824064577.pdfIn PDF document text
    • https://www.numberoneporthill.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a0ef2551b31---wuloginawisuwasuri.pdfIn PDF document text
    • http://ozari-ua.com/files/file/kigekimarufija.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=kamyab+jawan+program+online+apply+national+bankPDF 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
stream_005_off000165de.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x165DE 27812 bytes
SHA-256: dee315aaffa8c091f380b1863e0025e50192bbf21b3276cf46cdd967a082a1e0
font_00_sfnt_off00010630.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10630 17600 bytes
SHA-256: 0914df88b14128967891981989b85193577ef2b5cc5625a510fd12d2e02e937c
font_01_sfnt_off0001348d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1348D 10980 bytes
SHA-256: 081ef7997beda4f44758eaf7a4229332b6fc64d8b11bb04d0b9ca266375e6f26
font_02_sfnt_off00014dcd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14DCD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1