Malicious PDF — malware analysis report

Static analysis result for SHA-256 008942a017ec86ad…

MALICIOUS

PDF

88.2 KB Created: 2021-07-29 21:46:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: c8f2d2526e94870a5f39e7fc192cb538 SHA-1: 312f0081cf59771ff9385fe11e3c2c4fa4043b6a SHA-256: 008942a017ec86ad4db4e24d8c7707e922325473eaec4858847b7c52dc1f8c7a
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous embedded URLs, many of which point to compromised WordPress sites acting as link farms. These links likely lead to phishing pages or further malware downloads, indicating a malicious intent to lure users to untrusted destinations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://www.pietri-automobiles.com/wp-content/plugins/super-forms/uploads/php/files/j0c7s83q8m5mod11j9pnefq9iq/kodopubobizimupuzuv.pdf In PDF document text
    • http://1mosref.ru/ckfinder/userfiles/files/86877061356.pdfIn PDF document text
    • https://acrgroup.nl/userfiles/file/25622462202.pdfIn PDF document text
    • http://www.primalegal.eu/wp-content/plugins/super-forms/uploads/php/files/56pack9u0oo9jrg1bcn940e7e0/kijufumusazerojisevid.pdfIn PDF document text
    • http://nuyewrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/7cfbf06bbe6690a838942f6fe6d41efe/64058724371.pdfIn PDF document text
    • http://mp-hd.de/data/aktualnosci_imgs/file/fenuba.pdfIn PDF document text
    • https://hopefor.today/wp-content/plugins/super-forms/uploads/php/files/3b406ad6035e0b2e75cce096c3f2933c/kanelevolo.pdfIn PDF document text
    • https://saraelv.no/wp-content/plugins/formcraft/file-upload/server/content/files/160afa9aa2eb59---dusozakedenutas.pdfIn PDF document text
    • https://blindnow.com/userfiles/file/74117050412.pdfIn PDF document text
    • https://kar360.com/resimler/files/73708720373.pdfIn PDF document text
    • https://lcd96.ru/wp-content/plugins/super-forms/uploads/php/files/ce8e8c9dbb14bab4ece0b1e2783e6777/pakanolo.pdfIn PDF document text
    • http://fanti-fitness.pl/uploads/assets/file/vasafovisakonuweroxixavu.pdfIn PDF document text
    • https://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/5819675ebfc3b757a8cb42f923a049b7/10225466371.pdfIn PDF document text
    • http://scissortailfarms.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ce20b8cbd4---43052944174.pdfIn PDF document text
    • http://natur-pet.cz/webpagebuilder/ckfinder/userfiles/files/gefejomuwasodizededotexa.pdfIn PDF document text
    • http://fd-health.com/upload/ckeditor/files/35406913459.pdfIn PDF document text
    • http://nensi.si/upload/file/fogosowigezanagukaninib.pdfIn PDF document text
    • http://www.ecostroyservis.ru/File/fowidovejufaval.pdfIn PDF document text
    • https://alutat.com/data/file/82714186576.pdfIn PDF document text
    • https://www.llgnjinc.com/wp-content/plugins/super-forms/uploads/php/files/0c5d5dc92e1d503dea57ef69c9f1aaf7/tiwosavofir.pdfIn PDF document text
    • http://www.playerclub.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160910a5de1f36---67646601692.pdfIn PDF document text
    • http://lindseyderence.com/userfiles/files/zufasekokoguj.pdfIn PDF document text
    • http://apsons.eu/files/file/76780910703.pdfIn PDF document text
    • https://girl0229960192.com/upload/users/files/42027878903.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=chamberlain+liftmaster+professional+1%2F2+hp+manualPDF 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_off0000f1b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1B3 11100 bytes
SHA-256: 077e8e808030b978d61f7a82c5c745710bc53e1912148df4e3e25ec35983c108
font_01_sfnt_off00010b4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B4F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012361.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12361 17748 bytes
SHA-256: e67cb12529c202c5156fb0fc5671f4c19cd2102de21005e33e86f5ca66e4974d