Malicious PDF — malware analysis report

Static analysis result for SHA-256 69b7059051191b7a…

MALICIOUS

PDF

82.7 KB Created: 2021-09-03 17:34:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 8e7e3e6f674d5efe4e4289db37ff2b1b SHA-1: 3527e5c7f4d02471a638333305b3c178952d67d9 SHA-256: 69b7059051191b7ac4ecafb5c2bf1364a5287c33337491b05c8e7fcfa3f291f6
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to compromised or disposable domains, suggesting a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body is unreadable, but the heuristic firings related to link farms and compromised CMS uploads confirm the malicious nature of the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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=manual+locking+differential PDF link annotation
    • http://jubileejec.com/userfiles/files/93259616608.pdfIn PDF document text
    • http://solar-makernavi.com/ckfinder/userfiles/files/58870722685.pdfIn PDF document text
    • http://vitanova-cattery.com/upload/file/zaduxanetuloxed.pdfIn PDF document text
    • https://www.pharmaright.ca/wp-content/plugins/super-forms/uploads/php/files/5h8gbuaa7986m2vunfmajbama2/xafumegizovujasefemizevo.pdfIn PDF document text
    • http://ajivikafinance.com/userfiles/file/jirukiguseladixut.pdfIn PDF document text
    • http://broorybulldogs.com/clients/33993/File/74790444957.pdfIn PDF document text
    • https://behbehaniprojects.com/uploads/files/pemopaxomefakopireporusok.pdfIn PDF document text
    • http://axiomestates.com/userfiles/file/2562920658.pdfIn PDF document text
    • https://www.andimoda.com/wp-content/plugins/super-forms/uploads/php/files/8b33c49ac9670816269bcd20220b52cc/gikopamud.pdfIn PDF document text
    • https://enville.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8da6fb6f47---23693192171.pdfIn PDF document text
    • https://die-elke.de/cms/elke_page_files/file/luxurax.pdfIn PDF document text
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609469732e6d3---47666900538.pdfIn PDF document text
    • https://systematix.pl/userfiles/file/fonenajagubobivigipan.pdfIn PDF document text
    • http://sweatrinserepeat.com/ckfinder/userfiles/files/64925871326.pdfIn PDF document text
    • http://xaydungphongphu.com/uploads/files/65881509137.pdfIn PDF document text
    • http://nobody-films.com/bpms/includes/fckeditor_uploads/userfiles/file/84048513265.pdfIn PDF document text
    • http://tlumacz-bialystok.pl/pliki/file/6866312760.pdfIn PDF document text
    • http://xn--o79av69abka850ab6c.com/upload/file/202106260711472850.pdfIn PDF document text
    • https://www.alongsideasia.com/wp-content/plugins/super-forms/uploads/php/files/8f0478718e780e89948dd77509f9fe81/goluxojekus.pdfIn PDF document text
    • http://harc-ias.vn/Images_upload/files/nowarojenudijegi.pdfIn PDF document text
    • http://asid.rw/userfiles/file/zelewujoxogofusezike.pdfIn PDF document text
    • http://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a762aa0b13d---64104750976.pdfIn PDF document text
    • http://www.ssc-ras.ru/ckfinder/userfiles/files/54933917709.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_off0000de12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE12 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f629.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF629 10668 bytes
SHA-256: df6dddf37ecd15512d6174cc82d38df88cce20c9ed9f6440cfb6375349cdfe44
font_02_sfnt_off00010e88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E88 18068 bytes
SHA-256: 7ba8a4d4ffa8133b3d55ae7032ad2c92b08c741362fdeb9d402ca99cc034231f

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