Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e00cfbd318aaf74…

MALICIOUS

PDF

76.9 KB Created: 2021-06-28 15:15:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7b04acd757f69ce89cb3db034fd1bf79 SHA-1: cf33ca263b5fa8de648637e10318b79953f1c93e SHA-256: 8e00cfbd318aaf7454eedc7773ed266b43988cfc3f991892968ac8e308484e17
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The file functions as a link farm, containing numerous URLs pointing to compromised WordPress sites, likely designed to redirect users to malicious or phishing content. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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://oiweld.com/wp-content/plugins/super-forms/uploads/php/files/fdf80226e5464822cfce6819ed4bb779/kebunotus.pdf
    • http://ecbpolska.pl/wp-content/plugins/super-forms/uploads/php/files/931f667e2166f2930dca7c89ddedf637/78321215363.pdf
    • https://rhagro.com.mx/wp-content/plugins/super-forms/uploads/php/files/e4cd6b40bf5ec31668c57ca5d7b2ecb4/mitexatinovoru.pdf
    • http://fandimnarodaku.cz/upload/file/21729186625.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b8bb3efcbc---bogubisebozatomij.pdf
    • https://poldercuptrofee.nl/site/admin/ckfinder/userfilesfiles/febopezamov.pdf
    • https://www.chortho.co.uk/wp-content/plugins/super-forms/uploads/php/files/5lv4eiqegvg8i4p6pql655230r/24863646981.pdf
    • http://almar-bus.pl/userfiles/file/bodumogaxanavajamigesuxum.pdf
    • https://realestateconnect.biz/wp-content/plugins/super-forms/uploads/php/files/bt9e79hgn61s0v68nhc9il0hd1/18171585897.pdf
    • https://portsidestrategies.com/wp-content/plugins/super-forms/uploads/php/files/2f99368bb687a615119ce75d6b57fe37/98488129695.pdf
    • http://scamps.biz/userfiles/file/kakinirajutubibon.pdf
    • http://eastendmediation.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/71191693820.pdf
    • https://www.elektrobetrieb-scholz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ac314b1170c---parakaxisebomesafex.pdf
    • http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160a526df50043---kuzizupedamozul.pdf
    • https://sumangold.net.vn/wp-content/plugins/super-forms/uploads/php/files/3d2lgm0mvdgeoaeo0eb5tkmhun/23684150297.pdf
    • http://twfindia.in/userfiles/files/82860047831.pdf
    • http://slp70.com/clients/873855/File/31704801847.pdf
    • http://laiyi-art.com/userfiles/file/jamaxax.pdf
    • http://sushiloverca.com/uploads/files/3956845097.pdf
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d2081149b50---wijixuxik.pdf
    • http://woorymart.com/userData/board/file/9943263290.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=fire+force+s2+ep+5
    • 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_off0000c9df.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xC9DF 16792 bytes
font_01_sfnt_off0000e1f6.bin
d27151f8659986cbe1c632883d74bbb3f4816ca87062312a99f214dd26373061
pdf-font-stream PDF embedded font (sfnt) at offset 0xE1F6 10292 bytes
font_02_sfnt_off0000f951.bin
e7e9d645f58ca9510893fddbe4e0ca05d57f5caf57a52da50ea2e6456389200e
pdf-font-stream PDF embedded font (sfnt) at offset 0xF951 17088 bytes