Malicious PDF — malware analysis report

Static analysis result for SHA-256 94f290d47f2162ba…

MALICIOUS

PDF

80.9 KB Created: 2021-09-05 05:25:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 64154e57fcdadd528b6f8dadf7a90e31 SHA-1: b90949615d8346bdcdbaac1242571e9151202241 SHA-256: 94f290d47f2162bae65bd3e72e3e74d272ca83f4e17517ed2f86351b2433438a
156 Risk Score

Malware Insights

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

The file was identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a link farm. It contains numerous URLs pointing to various domains, including compromised WordPress uploads and disposable hosting, suggesting an attempt to lure users to potentially malicious sites. The PDF structure and embedded URLs strongly indicate a phishing or malware distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9833

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://infrive.ru/uplcv?utm_term=level+transmitter+calibration+pdf PDF link annotation
    • http://kuehllawpc.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/31181844533.pdfIn PDF document text
    • https://kubermatkaplay.com/ckfinder/userfiles/files/surodixet.pdfIn PDF document text
    • https://dnsbp.com/all4help/fckuserfiles/file/duvururewomikewoveles.pdfIn PDF document text
    • http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612a40bfc758d---29406614776.pdfIn PDF document text
    • http://osmed.cz/app/webroot/files/files/81223382766.pdfIn PDF document text
    • http://sgrappresentanze.eu/userfiles/files/85222286060.pdfIn PDF document text
    • https://icicle-mountaineering.ltd.uk/ckfinder/userfiles/files/xaxemejuk.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/sijatiwelozivevis.pdfIn PDF document text
    • https://jasz-pap.hu/UserFiles/file/59450030561.pdfIn PDF document text
    • http://kursadowicz.pl/Upload/file/pemesowanogarimora.pdfIn PDF document text
    • https://www.heainc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a072dac306e---lumizubumojisujiwim.pdfIn PDF document text
    • http://www.danvillern.com/wp-content/plugins/super-forms/uploads/php/files/3rjffhpjkjlq2bp7n8jm6tim05/92668871717.pdfIn PDF document text
    • http://ahcxdq.com/uploads/file/241759285806.pdfIn PDF document text
    • https://gencshoworganizasyon.com/upload/ckfinder/files/93537712037.pdfIn PDF document text
    • http://jogforbigt.com/clients/6/61/61f7a61d17da296148a50ccd59c4a139/File/dorope.pdfIn PDF document text
    • http://toyotarenta.net/FileData/ckfinder/files/20210723_53E269CB327E1C82.pdfIn PDF document text
    • https://macleanpinesdrivingschool.com.au/wp-content/plugins/super-forms/uploads/php/files/9f28c412cdbebf9b127fb0663d32c839/37723400300.pdfIn PDF document text
    • http://duszek-lasu.pl/userfiles/file/6315839328.pdfIn PDF document text
    • http://auto-spec.ca/fck/file/belet.pdfIn PDF document text
    • https://laihouston.com/wp-content/plugins/super-forms/uploads/php/files/0d9dab913489ef18a589ddb9108469ac/3140524728.pdfIn PDF document text
    • http://teamhead.net/userfiles/file/56463456092.pdfIn PDF document text
    • http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/160eca9a783435---fekezevamewobixegise.pdfIn PDF document text
    • http://willtorock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf38d719a27---72682524750.pdfIn PDF document text
    • https://certifiedmoversinc.com/wp-content/plugins/super-forms/uploads/php/files/745872980055295e6ef43b554787981d/zoterenafevevijobomugavu.pdfIn PDF document text
    • http://steclotildehorton.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608138502decc---81535003212.pdfIn PDF document text
    • http://bsa.by/ckfinder/userfiles/files/kiwumisidiweneb.pdfIn PDF document text
    • https://kopari.hu/files/file/fodibugow.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_off0000d828.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD828 10944 bytes
SHA-256: 9a7b4eb1aae37061fb33a6663e00bb290c904a1e1e4c694a737fa484141080d2
font_01_sfnt_off0000f147.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF147 17288 bytes
SHA-256: 05dc97d4b8698c46b1033c122fe44e02068a272c4995fab9897d6fb4517c7266
font_02_sfnt_off00011dcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DCC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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