Malicious PDF — malware analysis report

Static analysis result for SHA-256 2fc4e5da63b26544…

MALICIOUS

PDF

85.9 KB Created: 2021-09-07 18:45:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 8c97c91b936855675fa6448991f38810 SHA-1: 46cf5bef18168f87c564ca0b2097d1933db9bbf1 SHA-256: 2fc4e5da63b2654411c5fdbf64af0b51e68b5056eaf3d56d5b58e7917bb777d6
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier indicating a high probability of maliciousness. The file functions as a link farm, containing numerous URLs pointing to compromised websites and disposable hosting, likely intended to lure users into clicking malicious links. The presence of these links strongly suggests a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://huntic.ru/uplcv?utm_term=pivotal+cloud+foundry+documentation+pdf PDF link annotation
    • http://pck.malopolska.pl/wp-content/plugins/super-forms/uploads/php/files/0d2ab90a173b8be1caa0cfc0e080d645/90339163645.pdfIn PDF document text
    • http://gekon.net/userfiles/file/belufetuzofeganofunabexiz.pdfIn PDF document text
    • https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/31457c84fe46fbac7751e1aa2c0540ab/kixuxi.pdfIn PDF document text
    • https://hotelristorantenovecento.it/wp-content/plugins/super-forms/uploads/php/files/d389ec9b84238e9a033e476da8b16b06/12854243102.pdfIn PDF document text
    • http://iltorg.ru/upload/file/salagogodi.pdfIn PDF document text
    • http://duda-tech.pl/dudatech/upload/file/21884054663.pdfIn PDF document text
    • http://pogologistics.com/ckfinder/userfiles/files/72320389691.pdfIn PDF document text
    • https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b00209eecd---81924184742.pdfIn PDF document text
    • http://wrhs1967.org/clients/6/61/617565fc8afb9cc6d18abf932d248b7a/File/bogorifexevomojal.pdfIn PDF document text
    • http://tuning-zone.eu/userfiles/file/47559307336.pdfIn PDF document text
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160d01d22695b9---72088340157.pdfIn PDF document text
    • http://sjar-tech.com/uploadfile/file///2021071519251450.pdfIn PDF document text
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/3a1c1ef42fad9cc4ea760fec2e5851eb/nidafikuwixo.pdfIn PDF document text
    • http://kstarsmall.net/userfiles/file///samakagideje.pdfIn PDF document text
    • https://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/7f45c1c84670aa94f11908a8c35c137d/40788376320.pdfIn PDF document text
    • http://juniorsmagazine.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075279255169---maxibugofinapusokinod.pdfIn PDF document text
    • https://www.cr-sdc.org/wp-content/plugins/super-forms/uploads/php/files/43b9aca25cdffbc8055dbd18743cf927/76780533266.pdfIn PDF document text
    • http://immobiliareborghi.com/userfiles/files/fajonojonusakisa.pdfIn PDF document text
    • http://makinsushi.com/uploads/files/widitozeresama.pdfIn PDF document text
    • http://www.molinoag.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f40a3aa589---72250827166.pdfIn PDF document text
    • http://on-video.com/movies/movie_data/file/pejofizomiruzalo.pdfIn PDF document text
    • http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afa232a372d---rapodo.pdfIn PDF document text
    • http://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607546769fd1d---44156047626.pdfIn PDF document text
    • http://drairtools.com/ckfinder/userfiles/files/jepefusetewoduselozer.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_off0000ea71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA71 17448 bytes
SHA-256: d5cb9c4dd3f265c4f828a4c2556a250eb5f4309300a9a78c69c1de0429dd36a2
font_01_sfnt_off00011849.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11849 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013060.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13060 10892 bytes
SHA-256: a7943101816a27dc392577be89e6d5be038fc997a1611d0549e2023ae750788f

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