Malicious PDF — malware analysis report

Static analysis result for SHA-256 010f83bf32328434…

MALICIOUS

PDF

70.7 KB Created: 2021-09-29 05:03:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 61e5675b3a8f481c279439483153ea31 SHA-1: 3d0795a66915616935948df93451f147965daaf0 SHA-256: 010f83bf3232843406f98ed2e4e3160002b03af9367f1043d2b1c40e7a47e030
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised CMS uploads or disposable hosting, indicating a link farm designed to manipulate search results or redirect users to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://subded.org/userfiles/file/rarigotovafutonimi.pdf
    • http://thesei.com/
    • http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614316e2016b5---wovoxotonunisafatinok.pdf
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614d3b304006c---72952589709.pdf
    • http://lamexmarket.com/uploads/files/62797144376.pdf
    • http://architettoseneca.com/userfiles/files/12786448460.pdf
    • http://chukguwang.com/files/fckeditor/file/gopigufututalad.pdf
    • https://nyig.com/files/file/68260089743.pdf
    • https://epagneuls-bretons.fr/caningest/images/file/44161168533.pdf
    • http://es-umzuege-transporte.de/wp-content/plugins/super-forms/uploads/php/files/71ea993b8e013ca9381ab8366e0fd4f3/40663686244.pdf
    • http://ticaproduce.com/ckfinder/userfiles/files/62340187399.pdf
    • http://exosushi.com/uploads/files/pikavu.pdf
    • http://www.anclupnapoli.it/userfiles/file/bekajupurisavexubipik.pdf
    • https://www.la-melodie-des-saveurs.fr/ckfinder/userfiles/files/pudarikulerowes.pdf
    • https://hssanesteban.cl/files/32999930938.pdf
    • https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/161334a33b78cb---49482462391.pdf
    • http://blessingsngo.in/userfiles/files/52593619897.pdf
    • http://tzsunup.com/upload/mikel.pdf
    • https://lean-ds.com/upload/editor/file/19657412501.pdf
    • https://yaofangpeixun.com/upload/files/62053592225.pdf
    • https://mmagame.com/userfiles/file/kazadep.pdf
    • http://jswenguang.com/uploadfile/file/rixuzafi.pdf
    • https://pgprojekt.pl/Upload/file/jigeworemokibu.pdf
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16131697bbf688---10267404039.pdf
    • http://geoplan.su/userfiles/file/geweja.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=watch+jurassic+world+fallen+kingdom+online+free
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b49a.bin
c7215d080bc21aa241cccff3476fea07d28cc1439bbe467dae65a9728e4d3043
pdf-font-stream PDF embedded font (sfnt) at offset 0xB49A 14980 bytes
font_01_sfnt_off0000d9f6.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xD9F6 16792 bytes
font_02_sfnt_off0000f20d.bin
d32496f9ea5bc7570ac77df6cf57ffcc698c1be5872864e5c7c595b881015cbb
pdf-font-stream PDF embedded font (sfnt) at offset 0xF20D 11324 bytes