Malicious PDF — malware analysis report

Static analysis result for SHA-256 bec30a8563ed31ea…

MALICIOUS

PDF

111.2 KB Created: 2021-09-06 10:34:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: bba6567b0c753893a32b4458448de99c SHA-1: df22e4317adbc3be7a3a7ceeac944d220569b12e SHA-256: bec30a8563ed31ead1ed4bfdc9e8edd3ad188b94e667df4f43fad24d2f57abc2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links pointing to various websites, many of which appear to be compromised CMS upload directories. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution via these link farms. No scripts were extracted, but the structure and URL patterns suggest a lure to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://siyata.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1608af11171311---wabekuxatovupatobos.pdf In PDF document text
    • http://ngpsusa.com/wp-content/plugins/super-forms/uploads/php/files/b5oi7qprqmt8cn3oamd521a132/34920569029.pdfIn PDF document text
    • http://erex.hu/upload/file/32459101998.pdfIn PDF document text
    • http://praguetransfer.com/files/file/gesavuzodinarufasef.pdfIn PDF document text
    • https://markzone.az/wp-content/plugins/super-forms/uploads/php/files/kbgmmk2lfivq7a9in6223c8rop/65956257984.pdfIn PDF document text
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1608558b8bf4b3---julorirowu.pdfIn PDF document text
    • https://legacyltg.com/wp-content/plugins/super-forms/uploads/php/files/13ed568f9562d952d0553b9c70f0315b/94582778384.pdfIn PDF document text
    • https://www.servicioscalibrados.com/wp-content/plugins/super-forms/uploads/php/files/bcf75c9d2602011795bc75dcf2bc0724/navemidupevemuzatazo.pdfIn PDF document text
    • http://gpmpoolandspa.com/ckfinder/userfiles/files/nabujulelosonozake.pdfIn PDF document text
    • http://crystalnymph.by/wp-content/plugins/super-forms/uploads/php/files/ad597c0b35ad988937f08612e1878397/9364544701.pdfIn PDF document text
    • http://smn68.com/clients/75339/File/tebifujozitetomobezej.pdfIn PDF document text
    • http://kwik-it.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1610a66174307c---mepenoteruxubulizujexor.pdfIn PDF document text
    • http://myshopgroup.com/userfiles/files/86639506568.pdfIn PDF document text
    • https://earthchartercities.org/wp-content/plugins/formcraft/file-upload/server/content/files/160aae722e0093---jolilefimososux.pdfIn PDF document text
    • http://liqaa-lb.com/files/userfiles/files/jepejavudor.pdfIn PDF document text
    • http://jpind.pl/userfiles/file/jikekutowibupelebuk.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/28d32c263e7622a31e2af5901f093987/37754618199.pdfIn PDF document text
    • http://www.ddd-iasi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160f428e31655f---15233533060.pdfIn PDF document text
    • https://angkalaris.com/contents//files/damiruwe.pdfIn PDF document text
    • http://christembassydocklands.org/wp-content/plugins/super-forms/uploads/php/files/1f01962371e4b73c603654c7974d2038/69508613358.pdfIn PDF document text
    • http://s-privod.ru/userfiles/file/nelodepelasevuwuwagufi.pdfIn PDF document text
    • http://massageindex.nl/images/uploads/dazadaxugosi.pdfIn PDF document text
    • http://studiolorenzino.eu/userfiles/files/nigunikaxed.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=robocop+3+snes+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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000147d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x147D5 21048 bytes
SHA-256: b37a7be03a685a54587024de7eec14f279acf995452aa1d63b3d93b5e499e73a
font_01_sfnt_off00017efa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17EFA 10700 bytes
SHA-256: cb6a20c90b12d4a0c4aa9cfc5706211847c4741ca1ed9cdc277d086853101286
font_02_sfnt_off00019757.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19757 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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