Malicious PDF — malware analysis report

Static analysis result for SHA-256 601e550132f343bf…

MALICIOUS

PDF

80.5 KB Created: 2021-09-05 06:19:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-17
MD5: aef4d95f3ced80916884056def13f973 SHA-1: 78de728a35783b493bad39ad75f9551713755434 SHA-256: 601e550132f343bf5dd5be655c1c1063de7b915086c682f5b1d265cc27072d5b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The document functions as a link farm, directing users to numerous distinct hosts, many of which are compromised or disposable. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the structure and URL distribution suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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 http://elcolono.net/userfiles/files/wupidinofiwufuwogon.pdf In PDF document text
    • http://aarogyamedico.com/userfiles/file/45773911160.pdfIn PDF document text
    • http://ahlhy.com/uploads/file/280351118834.pdfIn PDF document text
    • https://autoandtruckrepair.net/nbloom/fckuploads/file/sabinuve.pdfIn PDF document text
    • http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/16112cbf461e12---xubaruzamox.pdfIn PDF document text
    • http://mottaing.eu/userfiles/files/64567201924.pdfIn PDF document text
    • http://clingac.com/d/files/50669866167.pdfIn PDF document text
    • https://gpuhub.net/wp-content/plugins/super-forms/uploads/php/files/4n8t8p6oht9igli530tp4j6rka/12270588651.pdfIn PDF document text
    • http://xn--42-6kcdlkbomh7beggito5p.xn--p1ai/userfiles/file/61557066472.pdfIn PDF document text
    • http://intechsol.kz/wp-content/plugins/formcraft/file-upload/server/content/files/1609df42ee56e7---famiwaxedulapozevig.pdfIn PDF document text
    • http://avtoarka.ru/wp-content/plugins/super-forms/uploads/php/files/8b3ed800ae9363a6e46590d68707c8ed/madovugoketugogi.pdfIn PDF document text
    • http://pahsclassof2005.com/clients/d/d6/d61c4c031b0f3af13d3e88110ef3a3e1/File/ravafaropugepirowode.pdfIn PDF document text
    • http://akinmedikal.com/uploads/file/41332350206.pdfIn PDF document text
    • http://cbelmira.com/wp-content/plugins/super-forms/uploads/php/files/vbr2tovkjlala3b99cvd0uac65/rukotavadamararuna.pdfIn PDF document text
    • https://betonwerkendejonge.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1612141a02141b---kiridawomisijagip.pdfIn PDF document text
    • http://2017.letnifestiwal.pl/ckfinder/userfiles/files/78643090337.pdfIn PDF document text
    • https://aslimitada.com/userfiles/file/27189802055.pdfIn PDF document text
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a707a2251ee---wuxazupaginudixubuveg.pdfIn PDF document text
    • https://fcksa.com/ckfinder/userfiles/files/28979840.pdfIn PDF document text
    • http://driver-jazda.pl/upload/file/lomowuvuvudifufizisuwezas.pdfIn PDF document text
    • http://tipsclubcr.com/campannas/file/46996945118.pdfIn PDF document text
    • https://moniimpex.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607098177c8f0---44395398529.pdfIn PDF document text
    • http://jfac.kr/ckfinder/userfiles/files/xotat.pdfIn PDF document text
    • https://chaletsuenodesol.de/files/timavekemerevok.pdfIn PDF document text
    • https://ocw.tw/uploads/files/pafubodid.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=chevrolet+suburban+2019+owners+manualPDF 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_off0000d266.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD266 11164 bytes
SHA-256: 850ce41caa3bb9987816b1a4bacb48846197f262943d7eceb08aeea167c698b4
font_01_sfnt_off0000ec88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC88 18272 bytes
SHA-256: d49a88cd7e221d09343e10c65dbb3d84179eb976e29f075fbed3435ca37c53e2
font_02_sfnt_off00011bdf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BDF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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