Malicious PDF — malware analysis report

Static analysis result for SHA-256 585498e48964c522…

MALICIOUS

PDF

79.6 KB Created: 2021-09-18 19:54:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 6b2aae57d5df999ff9726f8a39e7d314 SHA-1: 3e88bb8e6e1fd73d3683f192c9255195af3ea406 SHA-256: 585498e48964c52299dde15cc570293b86213d713e21795a1b163f3a70df596d
156 Risk Score

Malware Insights

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

The PDF contains a link farm with numerous URLs pointing to potentially compromised websites or disposable hosting, indicating a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://drafthe.ru/uplcv?utm_term=gta+sa+mod+ghost+rider PDF link annotation
    • http://hyundaidongdo3s.com/images/files/61611311071.pdfIn PDF document text
    • http://microsolder.hu/userfiles/files/95976825824.pdfIn PDF document text
    • http://realestatemiami.com/userfiles/files/fonezuwaketolazawug.pdfIn PDF document text
    • http://barrarioservicos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16134bef898c1c---98479958265.pdfIn PDF document text
    • http://dsfly.com/uploads/files/14336457331.pdfIn PDF document text
    • https://acp-luxusingatlanok.hu/ckfinder/userfiles/files/42223821363.pdfIn PDF document text
    • http://a-aqua.fr/ressource/site-image/files/rexotigikoreroburoloj.pdfIn PDF document text
    • http://elitsatodorova.com/uploadfiles/file/55561535647.pdfIn PDF document text
    • http://artwatch.ru/userfiles/file/tegerafoze.pdfIn PDF document text
    • http://j-club.eu/userfiles/file/40544196166.pdfIn PDF document text
    • https://lmcmanager.com/ckfinder/userfiles/files/62782641614.pdfIn PDF document text
    • http://www.smpnuenen.nl/images/files/16017098099.pdfIn PDF document text
    • http://iwilldoit.ru/uploads/files/files/sisikowos.pdfIn PDF document text
    • http://nitexprofi.cz/userfiles/file/6432330046.pdfIn PDF document text
    • https://pergamine.com/ckfinder/userfiles/files/39148588807.pdfIn PDF document text
    • http://nbc.com.vn/ckfinder/userfiles/files/panazerewaxutarujot.pdfIn PDF document text
    • http://hc6999.com/userfiles/files/49089562042.pdfIn PDF document text
    • http://ithalattagarantibelgesi.com/resimlerfiles/7690418503.pdfIn PDF document text
    • https://telliogluhukuk.com/userfiles/file/51995219696.pdfIn PDF document text
    • https://archcosmeticstudio.com.au/wp-content/plugins/super-forms/uploads/php/files/64062ecad7b19aca043bbdbc5d893733/3910404740.pdfIn PDF document text
    • https://marikakozmetika.hu/editor_up/vunujixu.pdfIn PDF document text
    • https://www.simplythebestevents.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16139c35a101b6---48777359653.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_off0000d389.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD389 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000eba0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBA0 10584 bytes
SHA-256: 67b64db23abe0254ca633145a5ec067e8677839afa41d0655a99b8fe73a49382
font_02_sfnt_off0001039a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1039A 17504 bytes
SHA-256: 1866d6dbe9f5c0e7144e70b2b72f24eeeb6f6c003e73bbd5f700c23b24d74b02