Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c7ff5d2cd44005c…

MALICIOUS

PDF

88.7 KB Created: 2021-06-28 23:19:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: a5467a3e03afb8f408cabe240c6964c5 SHA-1: 119d1de41f5cd277afe9ba6c11197255e9fc517a SHA-256: 3c7ff5d2cd44005cdc22c2b29ae4d935c1ce700d5c7fc686807ab817e5c5787b
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The file contains numerous links to external websites, many hosted on compromised CMS platforms, suggesting it functions as a link farm to distribute phishing content or further malware. The presence of multiple PDF link farm heuristics reinforces this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://irlanc.ru/uplcv?utm_term=encouraging+preaching+messages PDF link annotation
    • https://southtours.com/wp-content/plugins/super-forms/uploads/php/files/07acb10ab1i5f0mfudo57ch112/15764203945.pdfIn PDF document text
    • https://www.nestroots.com/wp-content/plugins/super-forms/uploads/php/files/4h9ocdknkbjb1arcd3b6vc8ml5/95158284958.pdfIn PDF document text
    • http://accurateverdicts.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb04baaf5a6---delisom.pdfIn PDF document text
    • https://joyfool.art/wp-content/plugins/super-forms/uploads/php/files/da2996259c0bd7b5bd9e8cab0ecf04ac/sonewemaladomawu.pdfIn PDF document text
    • http://forumcutuca.com/ckfinder/userfiles/files/riramenokimezifufakidul.pdfIn PDF document text
    • http://theopenhouseclub.com/wp-content/plugins/super-forms/uploads/php/files/fe86b273b0cdea48d6aa00d5565128ad/divenegazemeve.pdfIn PDF document text
    • https://daquin-ferriere.fr/userfiles/file/ravixurifumelagum.pdfIn PDF document text
    • https://atpl.aero/ckfinder/userfiles/files/73295869539.pdfIn PDF document text
    • https://www.harnoordesigns.com/wp-content/plugins/super-forms/uploads/php/files/eigktuj1i57376g0jk315hk5i1/68997478257.pdfIn PDF document text
    • https://sip7.pl/autoinstalator/sip7.online/wp-content/plugins/super-forms/uploads/php/files/e5267df125bdb2c2343432ff99d4aec9/nuveliravugaruwaveru.pdfIn PDF document text
    • https://amblamy.ee/upload/file/wosuwunogotarowutaxero.pdfIn PDF document text
    • http://lilit-realty.com/wp-content/plugins/super-forms/uploads/php/files/pu44rrbnsiigrtu1mfvqk08fs1/gimiwepigusekuje.pdfIn PDF document text
    • http://www.tecnobor.com/ckfinder/userfiles/files/gelevemelelaro.pdfIn PDF document text
    • https://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/33c4f5463da538dfa56306b034d0ecdc/pedotozerexizozerilijine.pdfIn PDF document text
    • https://hylyt.co/wp-content/plugins/super-forms/uploads/php/files/9d8fa6180efb9f6bd84e98a64b5bacf1/wufetiniwawi.pdfIn PDF document text
    • https://www.focus.mu/wp-content/plugins/super-forms/uploads/php/files/1f63a4ccac5e98800cb78697d3fa7ec1/vuxizufam.pdfIn PDF document text
    • http://cbgnfinance.com/userfiles/file/38023418357.pdfIn PDF document text
    • https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/00e87d888c5971f82283f0c8fedb45e6/48367275893.pdfIn PDF document text
    • https://ecef-groupe.com/wp-content/plugins/super-forms/uploads/php/files/8at4o0ofvriemk8qnnutui4432/89745019844.pdfIn PDF document text
    • https://www.rogierstoel.nl/wp-content/plugins/super-forms/uploads/php/files/pl5d3asj00f1c209tphcvi8imp/71783858373.pdfIn PDF document text
    • https://ruiguoex.com/upfile/files/2021/06/18/didobabove.pdfIn PDF document text
    • 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_off0000f902.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF902 17160 bytes
SHA-256: 45fa2901bd3d9385e36dbfdd4be6e423a1b5b8c1cab59d34a5695940788a09ec
font_01_sfnt_off00012555.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12555 10760 bytes
SHA-256: fe501097d145d379ff4c74cdab2ce60a6ea53f99caaca052e23d56e5107c76e9
font_02_sfnt_off00013dd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13DD9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.