Malicious PDF — malware analysis report

Static analysis result for SHA-256 f32a561a2d898938…

MALICIOUS

PDF

84.0 KB Created: 2021-09-10 02:46:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 8b37da335dd883e701d7192d3419365d SHA-1: a576ff30333f6fb0d1d9d8f2c609003bc65688dd SHA-256: f32a561a2d89893890ad80f0d89d73d83d5fbb06c02907a0c733470f33f33e8d
156 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are hosted on compromised or disposable domains, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9860

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://pistant.ru/uplcv?utm_term=wifikill+no+root+apk+download PDF link annotation
    • https://shirbandifelt.com/userfiles/file/54132365121.pdfIn PDF document text
    • http://mprime.net/ckfinder/userfiles/files/38224918092.pdfIn PDF document text
    • https://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/161323e8922dad---tidepifek.pdfIn PDF document text
    • http://chinazzjx.com/d/files/tavejinosotejomuleku.pdfIn PDF document text
    • https://dezsredstvompx.ru/wp-content/plugins/super-forms/uploads/php/files/960accd5d914252f97ec91fd869af9f0/xibufufekeloxuwi.pdfIn PDF document text
    • http://steclotildehorton.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16139667601c3f---20980774009.pdfIn PDF document text
    • http://travelspace.pl/userfiles/file/jivimufumaba.pdfIn PDF document text
    • http://xedaptap.net/userfiles/file/ripasu.pdfIn PDF document text
    • https://home18.ru/wp-content/plugins/super-forms/uploads/php/files/f36f0b9d2271723966cc295f195b87ca/zubira.pdfIn PDF document text
    • http://zajazd-broadway.pl/galeria/file/41847778961.pdfIn PDF document text
    • http://harposwebdesign.nl/app/webroot/files/userfiles/files/mabumufotupubemewovoj.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a5c9a37b2e---pepagupazimesavozideki.pdfIn PDF document text
    • http://fabrikando.com/cmsimple/images/file/36335468312.pdfIn PDF document text
    • http://studiodebiaggi.eu/userfiles/files/ximunakuxemafixesajopofom.pdfIn PDF document text
    • http://ubest.ru/images/file/97647711940.pdfIn PDF document text
    • https://oneremote.ru/wp-content/plugins/super-forms/uploads/php/files/97f86ed264d4ec88c4c0ec15dd1a9bf2/bezalixibetavanuje.pdfIn PDF document text
    • http://ooexperience.be/assets/Image/files/bedutafive.pdfIn PDF document text
    • http://oipipleszno.pl/userfiles/file/fenowujudagilinaruvobepe.pdfIn PDF document text
    • http://pecsimutargygaleria.hu/files/file/womeduvawuvub.pdfIn PDF document text
    • http://ilkjv.com/Images/Media/files/61348534263.pdfIn PDF document text
    • http://danieldesignpro.com/userfiles/21881007634.pdfIn PDF document text
    • http://asr-net.ru/uploads/files/4543819311.pdfIn PDF document text
    • https://grupo-kayros.com/userfiles/file/nonofuxikaresawutaboloni.pdfIn PDF document text
    • http://thuephotocopytaihanoi.com/upload/files/18639211661.pdfIn PDF document text
    • https://visualmotion.nl/uploads/file/33124830828.pdfIn PDF document text
    • http://www.depomatrial.com/file/vopatiwoni.pdfIn PDF document text
    • 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_off0000e5d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5D7 10360 bytes
SHA-256: 0fb2a95066adde07f25071496f2233a2ab542e26a5b33b001b67153332fd0289
font_01_sfnt_off0000fd59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD59 17376 bytes
SHA-256: 92b270aa513f48204199c24482c4812c9a7503251b427485c1f809dab9d3f23e
font_02_sfnt_off00012a99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A99 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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