Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ae368cd02face41…

MALICIOUS

PDF

71.1 KB Created: 2021-09-24 03:56:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c1e96d12b4356c3679f84c1f1408f1a6 SHA-1: 4651945b70dfeeac1728e9d6a37a2e979916e004 SHA-256: 8ae368cd02face4158db8399edf54532b7dcf1891f866688577ee3c845f775a2
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous links pointing to various websites, many of which are hosted on compromised CMS platforms or appear to be part of a link farm. The presence of URLs like 'https://gulertrafik.com/wp-content/plugins/super-forms/uploads/php/files/t8ljveukttbbodoctfse07r8j5/58815896356.pdf' suggests an attempt to redirect users to potentially harmful content, possibly for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://gulertrafik.com/wp-content/plugins/super-forms/uploads/php/files/t8ljveukttbbodoctfse07r8j5/58815896356.pdf
    • https://www.grandiosa.is/wp-content/plugins/super-forms/uploads/php/files/8cmahd42vrfro5l5uhjftmsof7/poloruboxozu.pdf
    • https://onhimalayas.com/ckfinder/userfiles/files/midutodenavulaz.pdf
    • http://chiengthai.com/file_media/file_image/file/sikazumawepotatum.pdf
    • http://wohingltd.com/userfiles/rimuresukeninolulute.pdf
    • http://ivankotov.ru/img/lib/file/50600366506.pdf
    • http://m3hotels.com/userfiles/file/gijubawinejagudixevisato.pdf
    • http://logistra.fr/ressource/site-image/files/nigizeliranovagiwetewu.pdf
    • http://xn----7sbqwxdbhblh2h.xn--p1ai/data/file/32732078267.pdf
    • https://brs.jo/userfiles/files/24211493281.pdf
    • http://ipceurope.eu/assets/file/ludivurifukajubafojogini.pdf
    • http://lukoilmarine.com/ckfinder/userfiles/files/8657245056.pdf
    • http://www.bewegeninarnhem.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1614c1a8417155---88361392355.pdf
    • http://galenbio.com/images/upload/file/81923808969.pdf
    • https://supermovi.com/userfiles/files/fizezepegetusozekoxuroga.pdf
    • http://telekommarketing.com/firme_data/files/94366251127.pdf
    • http://sorokolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/65051198512.pdf
    • https://raovat72.vn/uploads/news_file/bototonavogufigo.pdf
    • https://gberwanda.com/gbe/useruploads/blogs/files/rujojiligef.pdf
    • https://ocvirapuato.com.mx/wp-content/plugins/super-forms/uploads/php/files/342d041803d2ef6276297709cce46a99/44273586481.pdf
    • https://2-view.org/home/view/public_html/ckfinder/userfiles/files/mojuma.pdf
    • http://studiovalecchi.it/userfiles/files/mebofirubisi.pdf
    • http://www.kickcommerce.com/userfiles/file/laxifatolajokanugakapaxi.pdf
    • http://www.kigimex.com.vn/ckfinder/userfiles/files/mifazuxosorezoxoxerumik.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=wpa2+wifi+hack+apk
    • 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_off0000b704.bin
a8ee598f4aab52b4afcf06782188247fa63b2c245f59a3b01f68d1d10cca9dd5
pdf-font-stream PDF embedded font (sfnt) at offset 0xB704 16208 bytes
font_01_sfnt_off0000e088.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE088 16792 bytes
font_02_sfnt_off0000f89f.bin
2a052dc40ca5d56edd0c3739eafaa41f81360a8e0988d031e2da3340c3a2b8e7
pdf-font-stream PDF embedded font (sfnt) at offset 0xF89F 10100 bytes