Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce9f2fedc118c3d3…

MALICIOUS

PDF

137.0 KB Created: 2021-08-12 00:57:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 248fdc38ebd6fd66958e63d9d24dbd3e SHA-1: 232db4f2f2fa1e9b6cd61e099096ea947f13c746 SHA-256: ce9f2fedc118c3d37a8f9da7d4f732998c90be29302be19987d3cc35c4d52a42
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to redirect users to potentially malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9959

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://ratco-hardware.com/Ups/files/mazimifavekegot.pdf In PDF document text
    • http://alkanboya.com/files/file///pikirisexusisofifopot.pdfIn PDF document text
    • http://el-master.ru/userfiles/file/11546463654.pdfIn PDF document text
    • https://controlcert.se/wp-content/plugins/formcraft/file-upload/server/content/files/160b2fecf9de1e---72542918116.pdfIn PDF document text
    • http://kythuatviet.vn/uploads/userfiles/file/lomilot.pdfIn PDF document text
    • https://www.siemers-deutschmann.de/wp-content/plugins/super-forms/uploads/php/files/jhri6qq4gn573vtd3v17b46gjn/pilexu.pdfIn PDF document text
    • http://shmountaineering.co.uk/wp-content/plugins/super-forms/uploads/php/files/6tvl02nkc1i6h2uh4o41rddc17/59933970887.pdfIn PDF document text
    • http://grani-tonkogo-mira.ru/wp-content/plugins/super-forms/uploads/php/files/c0a054086678a99b2156d0fae3f6ea96/6089947555.pdfIn PDF document text
    • https://stallion-international.com/userfiles/file/tawurizenuf.pdfIn PDF document text
    • http://indago-rovigo.it/userfiles/files/fidigiw.pdfIn PDF document text
    • https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16084b8f67677c---38441240073.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/g1a8h4sus8m887iioigoc7d2n1/defavona.pdfIn PDF document text
    • http://www.gc-antey.ru/ckfinder/userfiles/files/44092968723.pdfIn PDF document text
    • http://confidenzacsapagy.hu/upload/talelobelesenunope.pdfIn PDF document text
    • http://www.psychophonie-tarbes.com/ckfinder/userfiles/files/rafuxutilojiboxe.pdfIn PDF document text
    • https://petroblend.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd6bfef1a34---sunigusa.pdfIn PDF document text
    • http://technoculture.cz/admin/upload/file/813248335.pdfIn PDF document text
    • http://r2doodles.com/clients/4/4a/4a4ed909dcef54c1e3ec6a0ce1d29f2d/File/4847726018.pdfIn PDF document text
    • https://gruntbudowa.pl/files/file/noluxezenego.pdfIn PDF document text
    • https://boldvision.tv/wp-content/plugins/formcraft/file-upload/server/content/files/160a3a340164b1---40193859246.pdfIn PDF document text
    • http://novichiha.ru/pic/file/56220842958.pdfIn PDF document text
    • https://ochronaskory.pl/pliki_user/File/86677664711.pdfIn PDF document text
    • http://ngnjl.com/userfiles/files/16668727635.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=netgear+wifi+booster+ac1200+reviewPDF 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_off0001b454.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B454 10924 bytes
SHA-256: 6d803717361b2cb1376e06d2a19382adc6790b8690e34e7866d6d9cf32551f5e
font_01_sfnt_off0001cdf3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CDF3 18656 bytes
SHA-256: a2f7d7336a600177416e855ba6985f763e62e325c1d65f970fa15e1a12d225a5
font_02_sfnt_off0001fd8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1FD8F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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