Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f945b92c9fed17c…

MALICIOUS

PDF

82.8 KB Created: 2021-09-01 21:51:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: d61eb211cd07e05432d13147e7a07ffe SHA-1: 2b852fe6dd13596e7c132564bf6d62caf6c45897 SHA-256: 6f945b92c9fed17c049166b3e6763bd4277cc63fc67ee9c5f70680bd47b7fd18
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to numerous URLs, many hosted on compromised CMS platforms, indicating an attempt to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent. No scripts were extracted, but the structure and URL analysis are sufficient to determine the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://travelstore.tn/userfiles/file/98873053736.pdf In PDF document text
    • https://soba05.org/wp-content/plugins/super-forms/uploads/php/files/58f5caace6421fe6cd2075602c45ae9c/67619982161.pdfIn PDF document text
    • https://chpcentre.com/files/file/97912142081.pdfIn PDF document text
    • http://atomleasing.ru/media/File/zitenijati.pdfIn PDF document text
    • http://nfc-lampang.com/user_img/files/tukujiwiromorok.pdfIn PDF document text
    • https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/16086f913d7917---sujeraferolagu.pdfIn PDF document text
    • https://xn--80aaa1anac6cg.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/70c02d22875da17489e531a35dee0687/36800018147.pdfIn PDF document text
    • https://waxparadise.pl/userfiles/file/norowejexidox.pdfIn PDF document text
    • https://na-nule.ru/wp-content/plugins/super-forms/uploads/php/files/8mlg33tr5rpec6v4cm44puiqi0/mubogawifosafek.pdfIn PDF document text
    • https://ski-valloire.com/ckfinder/userfiles/files/73510357695.pdfIn PDF document text
    • https://anukulagrotech.com/ci/userfiles/files/78584995664.pdfIn PDF document text
    • https://marigabung.com/contents//files/juximukoninolezuzef.pdfIn PDF document text
    • http://temple.mo/userfiles/file/25341398627.pdfIn PDF document text
    • http://xn--80aaffebba2apgigwiiececnggk9e4k.xn--p1ai/pict/file/tijokinoremanadatas.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/fb4e689681c2f9882235a52253c3649a/jebamawodozoge.pdfIn PDF document text
    • https://www.wflorlando.com/wp-content/plugins/super-forms/uploads/php/files/55df1e1ff3deaf00c227340a0a59c50d/xeparawunusumefoxe.pdfIn PDF document text
    • http://innospectrum.eu/hirlevel/file/rilimijujobubuvusere.pdfIn PDF document text
    • https://fiscconsulting.com/userfiles/file/57144546326.pdfIn PDF document text
    • https://www.masismarketing.com/wp-content/plugins/super-forms/uploads/php/files/0eb2bb87ff70152115e754222a79dfa4/77394099310.pdfIn PDF document text
    • https://mekongtransport.com/upload/userfiles/files/luwerixikanemeji.pdfIn PDF document text
    • https://livresdarts.com/ckfinder/userfiles/files/67140879628.pdfIn PDF document text
    • http://hebammenglueck.de/ckfinder/userfiles/files/tajokimopozukononum.pdfIn PDF document text
    • http://ghettaetamionarchitetti.it/userfiles/files/juzipeg.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=heaven+and+earth+will+pass+away+revelationPDF 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_off0000dbc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBC4 18684 bytes
SHA-256: a4cef6e8783aa7b850bc97813f2f36c66781ee8161d6395fdc2143434f1c5c77
font_01_sfnt_off00010c7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C7E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012495.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12495 10748 bytes
SHA-256: fce5144d10486e33b761db50a8d192c856e5c3db5d1b03d49f6507758f9e2967

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