Malicious PDF — malware analysis report

Static analysis result for SHA-256 22961464a02c06cd…

MALICIOUS

PDF

89.7 KB Created: 2021-07-13 23:10:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: bad38390e5b7ebd2d90ee01feb6d731b SHA-1: 1761d8ba765da70016c2452a7b5000a2eb998b39 SHA-256: 22961464a02c06cdb1b87f285c393773933c6eaaa13a2ea781850f7130c6357b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ML classifiers and ClamAV. It contains numerous external URIs, many pointing to compromised WordPress sites, suggesting it's part of a link farm designed to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics indicate a phishing or malware distribution attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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://krisoc.ru/uplcv?utm_term=classified+pack+a+punch PDF link annotation
    • https://aduanaldelvalle.com/userfiles/file/tofuzozutujiwonede.pdfIn PDF document text
    • http://www.fsnn.se/wp-content/plugins/formcraft/file-upload/server/content/files/1609d6c4f63a21---33280904521.pdfIn PDF document text
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071204e94e6b---julaxefikab.pdfIn PDF document text
    • http://weingut-suppan.at/files/15093623568.pdfIn PDF document text
    • https://borderpak.com/wp-content/plugins/super-forms/uploads/php/files/6e34d71457b5c5a820c9b67853a9c30b/gajat.pdfIn PDF document text
    • http://www.mkkdigital.pt/wp-content/plugins/formcraft/file-upload/server/content/files/1607a4cbc5525a---74769404956.pdfIn PDF document text
    • http://tulsamemorialclassof71.com/clients/84987/File/18715426734.pdfIn PDF document text
    • https://staffxrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/8f97cba6bec8b581789066d2ed812443/88374991267.pdfIn PDF document text
    • https://gaseg.com/wp-content/plugins/super-forms/uploads/php/files/b5u3o32nmi5aq6cfgmv3lieg5d/renuzugijudubowojozuf.pdfIn PDF document text
    • https://alianzatours.com/imagenes/file/jifisawab.pdfIn PDF document text
    • https://www.alarisusallc.com/wp-content/plugins/super-forms/uploads/php/files/4414b1fd1e2b4f3af36db2fcf52fceb8/50600832641.pdfIn PDF document text
    • https://brianhigbielaw.com/UserFiles/file/tubusidonikulelokuw.pdfIn PDF document text
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/16071d88a438d2---95296688610.pdfIn PDF document text
    • https://marcuspietrek.de/MARCUS/files/file/52185039966.pdfIn PDF document text
    • https://hsegroup.ru/wp-content/plugins/super-forms/uploads/php/files/t1ufck7nu24mge0chl7pca5227/99817082374.pdfIn PDF document text
    • http://xn--h1agcmh.com/ckfinder/userfiles/files/lixufuf.pdfIn PDF document text
    • https://alshaabcoop.com/userfiles/file/72377388990.pdfIn PDF document text
    • http://www.biotanika.pl/upload/file/ganegegaloboxi.pdfIn PDF document text
    • http://alpha-cp.com/userfiles/file/putaxewatapolexuxil.pdfIn PDF document text
    • https://www.euroservicemilano.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a888252f17d---38166203867.pdfIn PDF document text
    • http://fecirturizm.com/resimler/files/danobirolip.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_off0000f8b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8B4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000110cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110CB 10624 bytes
SHA-256: 0d2f90c1e3ec08a938196f032dfaa9ad87d62e933614001a890adc9bb687ab9d
font_02_sfnt_off000128f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128F3 18012 bytes
SHA-256: bcad7ad69c0a911ed0a807e5ad941ba5db6978871ef236243bc44181ed83dd84

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