Malicious PDF — malware analysis report

Static analysis result for SHA-256 0feca735371b82a2…

MALICIOUS

PDF

88.6 KB Created: 2021-09-01 15:00:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: f9cdd95eb322d62920822844ce3fe0b3 SHA-1: c5bdff6c9e550194caccc8e2f8ad4826c7b2396b SHA-256: 0feca735371b82a236e29f4b8f63f5aba79cc35a2df0d73db570820c2f4b131a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a link farm pointing to numerous disposable domains and compromised CMS uploads, a common tactic for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to lure users to external sites for further exploitation. No scripts were extracted, but the structure and URL patterns suggest a phishing or downloader attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9940

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://www.lamuccacompany.com/wp-content/plugins/super-forms/uploads/php/files/a9f6eaaf526a87ae7a2a0c1836c884fd/89654149238.pdf In PDF document text
    • http://korvet-sp.ru/userfiles/file/vobibebowexesoz.pdfIn PDF document text
    • http://targhevaticane.it/userfiles/files/39019992359.pdfIn PDF document text
    • http://alexlunacoach.com/img/editor/file/sapatutivabaso.pdfIn PDF document text
    • https://masterpieces-mallorca.com/wp-content/plugins/super-forms/uploads/php/files/3786a5c41df42e83814a97fd22b60b75/mikenogaso.pdfIn PDF document text
    • http://firstcuwire.com/file_media/file_image/file/lafuvuketuseg.pdfIn PDF document text
    • https://www.inkfactory.pk/wp-content/plugins/formcraft/file-upload/server/content/files/1608408a9d3d91---7444201249.pdfIn PDF document text
    • http://blessingsngo.in/userfiles/files/84689877045.pdfIn PDF document text
    • http://n-production.com/upload/fckeditor/file/sukebenizumapigixusenekaz.pdfIn PDF document text
    • https://chungcungoaigiao.net/uploads/files/boxizafubisepuwo.pdfIn PDF document text
    • http://tuning-zone.eu/userfiles/file/setaxafokanasapelinibare.pdfIn PDF document text
    • https://www.kbstephens.com/wp-content/plugins/super-forms/uploads/php/files/c9b21a98a30089f4c0f84847a5493fd4/sisanigajuxofuxutizaxer.pdfIn PDF document text
    • http://lnshiyue.com/userfiles/file/20210807222714_1516472762.pdfIn PDF document text
    • https://myphi.biz/nbloom/fckuploads/file/gipapizopabugabetovo.pdfIn PDF document text
    • http://parentini.it/userfiles/files/rixigoxapirifotovonago.pdfIn PDF document text
    • https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4d8114bcfc---25608726600.pdfIn PDF document text
    • http://thietbianninh188.com/uploads/files/nexerobotujuxanag.pdfIn PDF document text
    • https://cullinanconstruction.com/wp-content/plugins/super-forms/uploads/php/files/2nsakdj872gb7orbsis74b3ht0/87330424541.pdfIn PDF document text
    • https://www.ergunaygoren.com/wp-content/plugins/formcraft/file-upload/server/content/files/160709d3a44fa3---jexufeleruvopoxeriluxif.pdfIn PDF document text
    • https://thetitangroup.ca/wp-content/plugins/super-forms/uploads/php/files/820dd4fb45050ccb5456a984a8bf010f/52066715849.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160792878e306e---teterapoziwizax.pdfIn PDF document text
    • https://frontlinetherapist.com/wp-content/plugins/super-forms/uploads/php/files/8ebc1c11ba3002be94ffabf947b7f619/fivatekadopagedozeke.pdfIn PDF document text
    • http://www.gradur.ba/wp-content/plugins/formcraft/file-upload/server/content/files/160807c313b669---tiged.pdfIn PDF document text
    • http://villabrown.it/userfiles/files/88266632254.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=how+to+crop+a+pdf+file+in+foxit+readerPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC86 1868 bytes
SHA-256: 9d2bb2d94384256bb38bab4c3005c13f44a8b25eb5b232dcefe64ad24aae4b51
font_01_sfnt_off0000e53d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE53D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fd4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD4F 24332 bytes
SHA-256: 295dd45d34ce3d15904d74176b053b9f1170e7724ace19c14b8a71a6202ac28e
font_03_sfnt_off00013a03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A03 10624 bytes
SHA-256: f2d2307309894581f24a422bade28d827fc8df0c7b01a1d1bb94541f95dd9575

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