Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0f1d1aa429abcce…

MALICIOUS

PDF

153.3 KB Created: 2021-06-28 06:55:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: bf1fcff0859c2eeb8bf92dd3b6947e7c SHA-1: 24e21e4abb1a6a486a8af0fb17362c39437bfe2e SHA-256: d0f1d1aa429abcce5ad9ca6cda026d07cdf245b424a1dddf161cc279c11b7f00
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ML classifiers and ClamAV. It contains embedded JavaScript and numerous external URIs, many of which point to compromised WordPress upload directories. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates it functions as a link farm, likely to redirect users to malicious sites for phishing or malware delivery. The embedded JavaScript is a common technique for exploiting PDF vulnerabilities or initiating further malicious actions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://atraba-holding.com/userfiles/file/vodotuxiroroxusupogen.pdf
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a444e636ad---wugegepowogukikikoba.pdf
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f5ea0d2826---jonevokekuzijaxajodifel.pdf
    • https://comesa.com.pe/wp-content/plugins/super-forms/uploads/php/files/anpv1rn3couaf87jqiql2uh5k4/nosavidoropiler.pdf
    • http://endustriyelkiralama.com/wp-content/plugins/super-forms/uploads/php/files/t36sb4b4fl7pasd5ref4sbp29s/18456291171.pdf
    • http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607525c128f71---wumekijatik.pdf
    • http://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/1609862aac5d61---tawodawagobixepubanikawol.pdf
    • http://portalcom-b2b.es/img/user///file/_0141635001620615441.pdf
    • https://hoakhanh.vn/uploads/image/files/21242832987.pdf
    • https://unosms.us/userfiles/file/71131179582.pdf
    • https://betenenergy.com/sites/default/files/file/30370250360.pdf
    • https://basisnomor.com/contents//files/ropifimadopob.pdf
    • https://polinagerz.ru/wp-content/plugins/super-forms/uploads/php/files/c8nicqhut2guqls019r2csit5i/22587740992.pdf
    • http://www.contal-farmer.com/uploads/files/damuzivegafoxenitevun.pdf
    • https://www.femregenx.co.za/wp-content/plugins/super-forms/uploads/php/files/akf9d37bi7vpmrhgacigo88n48/78821767730.pdf
    • https://lostsoulsmemorialnj.org/wp-content/plugins/super-forms/uploads/php/files/1282ee510e27d784f5eaaf2625cf0047/tizuzosakunogadorinenu.pdf
    • http://cioccolatogallucci.it/userfiles/file/41943307738.pdf
    • http://webdulich.com/js/ckfinder/userfiles/files/silaribuxevu.pdf
    • https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160cefa0cdbcb4---66179374200.pdf
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079fcc2b8870---94552375758.pdf
    • http://cetinelektrik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16099e17f19bed---tiwuzujaresikobanu.pdf
    • https://aarhuskortet.dk/images/file/5220823330.pdf
    • https://youstore21.com/wp-content/plugins/super-forms/uploads/php/files/cee99a9665009690ec552a9c72cc6e29/8521169244.pdf
    • https://namastehealth.in/wp-content/plugins/super-forms/uploads/php/files/m182b2vp3ko7slkk3u9vj341tl/geluwofaziwozezalipezex.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=mickey+mouse+1930+costume
    • 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_off0001f597.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1F597 16792 bytes
font_01_sfnt_off00020da9.bin
ac8c9d031b0784a40345cadd4abf96d789b0137ca0fe1cf9913d1401b19227a3
pdf-font-stream PDF embedded font (sfnt) at offset 0x20DA9 18556 bytes
font_02_sfnt_off00023ea7.bin
dc07b73bd4cd7f3c73f905c504a2041ced82e6ce96ffae308e2731b837edd1db
pdf-font-stream PDF embedded font (sfnt) at offset 0x23EA7 10792 bytes