Malicious PDF — malware analysis report

Static analysis result for SHA-256 eea6963d2ec279d8…

MALICIOUS

PDF

84.6 KB Created: 2021-06-28 17:48:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6cd0ff3865abbc33f4a804e9e7e72e1a SHA-1: 04053086805dd620eaaaaa78cc63097672f2eaa5 SHA-256: eea6963d2ec279d894a5f48caec47ca3766156df0c20d690bc4d523be8ea9956
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised WordPress installations or disposable domains, indicating a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery via these external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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 http://fotossc.pl/_files/file/9722871070.pdf
    • https://ihotel2b.com/upfiles/editor/files/jufixa.pdf
    • https://www.westcountrystoves.co.uk/wp-content/plugins/super-forms/uploads/php/files/50fa6f64b316e00cdfaf7f2124ea0c1e/62732789793.pdf
    • https://formapolis.it/wp-content/plugins/super-forms/uploads/php/files/7c8f7374b1b17788a6c78ba9b7dded6e/78540766816.pdf
    • http://www.orarestauratorisaf.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608dc00d3f3a1---5917714637.pdf
    • http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086eccd213fd---81899238083.pdf
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609277ca851ec---29290525126.pdf
    • http://ambvetfanini.eu/userfiles/files/madatededawubaf.pdf
    • https://velvetskin.pl/wp-content/plugins/super-forms/uploads/php/files/e6226b38753adadb9ba5391b1d2cbeb0/bexaperagotug.pdf
    • http://skyline1968.com/clients/74864/File/nolugutegapamowedu.pdf
    • https://www.ergunaygoren.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dad4c28a84---70695896962.pdf
    • http://ithaca1966.com/clients/8/85/85e9e0a76fddb83d7689cebc6ab07fae/File/maporane.pdf
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/b3h5baa69786r61k83ms3gjhj1/45748706951.pdf
    • https://eltonltd.ru/sites/default/files/uploads/dageradorisinazasufomep.pdf
    • http://www.mondzorgvesa-voorschoten.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607461f8a21b3---19872642824.pdf
    • https://eternalbliss.net/file/zires.pdf
    • https://coluer.ir/documents/file/laferonorumised.pdf
    • https://landlorddebtadvisory.com/wp-content/plugins/super-forms/uploads/php/files/5i8tsjaeln1dverv811gnra221/5638502761.pdf
    • https://beaumont-residence.com/wp-content/plugins/super-forms/uploads/php/files/rfgohkkj1jmuq11g3upd0cf7v9/85190260993.pdf
    • https://pluviaterra.mx/wp-content/plugins/super-forms/uploads/php/files/550e56d0335cc9a287a2c2bdd700649e/nidigutafubawetos.pdf
    • https://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/kn44h62gh7uq6hcfqnrf8rl6s5/38142279539.pdf
    • http://www.sunarnuricomuisvealisverismerkezi.com/wp-content/plugins/super-forms/uploads/php/files/stmms4h1fl8stfcmibn6vvhun7/14073485374.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=ravens+rooks+and+crows
    • 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_off0000eaab.bin
63c8c9511755ffbf6363ee4e1c18f76c614508a2538202b8f4115975755aa779
pdf-font-stream PDF embedded font (sfnt) at offset 0xEAAB 10416 bytes
font_01_sfnt_off0001027d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1027D 16792 bytes
font_02_sfnt_off00011a8f.bin
68d6dfc00e3d0287ff09e70bea4235c0bbab44c1b1f958f867d554915a4bbfb0
pdf-font-stream PDF embedded font (sfnt) at offset 0x11A8F 16584 bytes