Malicious PDF — malware analysis report

Static analysis result for SHA-256 64eea913e70db825…

MALICIOUS

PDF

89.5 KB Created: 2021-07-29 11:44:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: f4ee3f76c960665d448bbb5c3ee9c2a4 SHA-1: 8e378a4ca86ca88425ef76f9ac7dce0d87a606b2 SHA-256: 64eea913e70db825927b0367420682cb5b2304324c11ab10e5817d9222ec5a2d
256 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1071.001 Web Protocols

The PDF document is classified as malicious by ML and ClamAV, and exhibits characteristics of a phishing lure. It specifically requests recovery secrets or MFA confirmation, indicating an attempt to steal credentials or session tokens. The presence of numerous embedded URLs, many pointing to compromised CMS upload storage, suggests a distribution mechanism designed to host and serve the malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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://apoc.com.au/wp-content/plugins/super-forms/uploads/php/files/295627bbc4f40e6eb06b37e6c9da115b/gapotejaramifuwibi.pdf In PDF document text
    • http://akcjonariusz.com/UserFiles/file/45338085995.pdfIn PDF document text
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3972cec143---87797177774.pdfIn PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/2d3df49c7cacdfc18c574193e3373b19/taxuvojusepu.pdfIn PDF document text
    • http://chizclean.ru/files/fck/file/87553296825.pdfIn PDF document text
    • http://lhjmfamily.com/clients/5/5d/5d8645f74963a96e1aea25f3b610eff6/File/xebofurenifiwe.pdfIn PDF document text
    • http://dianacb.cz/userfiles/file/pepofunidodikeli.pdfIn PDF document text
    • https://suksesunited.com/contents//files/75764315366.pdfIn PDF document text
    • https://cal.lighting/wp-content/plugins/super-forms/uploads/php/files/751ab62d77b7a01f74d926ad21619d33/rotovu.pdfIn PDF document text
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608767541e2e3---mivozolekil.pdfIn PDF document text
    • https://activepymes.com/pub/file/48338471020.pdfIn PDF document text
    • https://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c0b3427b9bd---5431654215.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/4ece19e49469a16bbc163d8b674694d8/96395357483.pdfIn PDF document text
    • https://www.tctnanotech.com/wp-content/plugins/super-forms/uploads/php/files/69d05826dfcb766f2fd4e27dd53c4778/nenikularuvibu.pdfIn PDF document text
    • http://qhzs88.com/admin/fckeditor_upfiles/file/2021062812063280554.pdfIn PDF document text
    • http://tantusmarina.com/UserFiles/file/47845298392.pdfIn PDF document text
    • http://dolinakrzeptowa.pl/public/upload/ckfinder//userfiles/files/95942139542.pdfIn PDF document text
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e8f60d808d4---vedujimazopebilekexafez.pdfIn PDF document text
    • https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e31c2fd217e---sufuridedatiludeto.pdfIn PDF document text
    • https://ms01bet.net/contents//files/bopiwuzopo.pdfIn PDF document text
    • http://drapa-technika.cz/UserFiles/File/78419034028.pdfIn PDF document text
    • http://sun-green.de/ckfinder/userfiles/files/livekifukupumudebufitoba.pdfIn PDF document text
    • http://aarogyamedico.com/userfiles/file/24657735005.pdfIn PDF document text
    • https://youstore21.com/wp-content/plugins/super-forms/uploads/php/files/22cb7cee46bde1d0233bde24ec6108a9/9942913083.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=how+to+reboot+swann+dvrPDF 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_off0000fa52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA52 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011269.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11269 10388 bytes
SHA-256: c16b4aa4bf2dc508de76e35e0e0eda2eda91b2006a08640386a1c49793c02219
font_02_sfnt_off00012a16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A16 17640 bytes
SHA-256: cddbe1f77c2118a30773926eb0c5af7dc1313cdffa91d95751b3c6dbdf766cb4