Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2e343cc382b21a2…

MALICIOUS

PDF

80.6 KB Created: 2021-08-16 01:03:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: b6981629e9d4612b5fef310768741895 SHA-1: 217a33e4d422599eaad56897631c6402a4533f3d SHA-256: f2e343cc382b21a25ae1a69cb1a6d99447f2221c440f2258c8400d5b8e133585
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to numerous URLs, many hosted on compromised WordPress sites, likely for phishing or malware distribution. The PDF structure and embedded links suggest an attempt to exploit users through deceptive content, aligning with spearphishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://drafthe.ru/uplcv?utm_term=how+much+does+the+average+prenup+cost PDF link annotation
    • http://www.akutrans.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4896689db3---29036725292.pdfIn PDF document text
    • https://israelonthehouse.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a744c96b03---pajowogebupareme.pdfIn PDF document text
    • https://radmangroup-ye.com/rgfiles/file/sawavikagi.pdfIn PDF document text
    • https://kindliving.org/wp-content/plugins/super-forms/uploads/php/files/tmp/86816836485.pdfIn PDF document text
    • http://cartopack.com/Images/file/19197231551.pdfIn PDF document text
    • http://www.tekkoo.net/images/library/File/kopuz.pdfIn PDF document text
    • https://preprodpcb.com/userfiles/files/25823006068.pdfIn PDF document text
    • https://www.clubmanizales.com.co/wp-content/plugins/formcraft/file-upload/server/content/files/1609d1f8d8777d---39669680522.pdfIn PDF document text
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085c17ccc72e---tabetazabevi.pdfIn PDF document text
    • http://ibrahimalsada.com/pics/file/96285329436.pdfIn PDF document text
    • https://xn--80adj7cxa.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/385bae32875cb81d64dcacb06c5c8904/48636521869.pdfIn PDF document text
    • http://plan.msu.ac.th/ckfinder/userfiles/files/9343593659.pdfIn PDF document text
    • https://tenshinorchids.com/FCKeditor_upload/file/34984812979.pdfIn PDF document text
    • https://journeypeople.cc/wp-content/plugins/super-forms/uploads/php/files/f86a02e258a03456d322716a57c43153/gawabesew.pdfIn PDF document text
    • http://cameronhaddock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9865308d68---tinasujuxus.pdfIn PDF document text
    • https://precisionautoandac.com/wp-content/plugins/super-forms/uploads/php/files/47501ea268ace35b4b77b1b5095e32f2/jigetir.pdfIn PDF document text
    • https://www.grandiosa.is/wp-content/plugins/super-forms/uploads/php/files/rh9knm5vl360ao8bggnlm5fbd3/44324967691.pdfIn PDF document text
    • https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/1608c3ab9305f0---xowelal.pdfIn PDF document text
    • http://letresorellebio.it/userfiles/files/48942334923.pdfIn PDF document text
    • https://paloaltospeakerseries.com/wp-content/plugins/super-forms/uploads/php/files/bb7eb0ff1484d6bb9ec152b8a063250e/10681308766.pdfIn PDF document text
    • http://krukewittfarms.com/userfiles/file/12976373416.pdfIn PDF document text
    • http://cpk.by/ckfinder/userfiles/files/nulibipaper.pdfIn PDF document text
    • http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/161147fcf6bf31---93467028905.pdfIn PDF document text
    • http://samurairamenbar.com/uploads/files/4987743103.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_off0000d9b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9B0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f1c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1C7 11064 bytes
SHA-256: 0f80fa39faba7e63cf66ce0dd20fccebbf12f80d26188b7ae51ba8cb05ba4929
font_02_sfnt_off00010b3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B3D 16136 bytes
SHA-256: 37f596a570704e7fa8266d5f69c34c1f0d0160f1983217a6dc86da9d30401c29

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