Malicious PDF — malware analysis report

Static analysis result for SHA-256 d06ea1fce1e2f937…

MALICIOUS

PDF

87.9 KB Created: 2021-08-06 22:45:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: afd3f47de168b5b68af6a734a49ef0dd SHA-1: 25c8c8ca1ef090c90e0abdf222f6a8222a7d9662 SHA-256: d06ea1fce1e2f937f4e776212e0e0c17f51e15fa9bb21b47949dad29e5734de5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links, many pointing to compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users to malicious sites. While no scripts were directly extracted, the PDF structure and heuristics indicate it's designed to facilitate access to external malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://sandzak.best/wp-content/plugins/super-forms/uploads/php/files/fc2e5f835376d72418bd61ff7f65f01e/gevonaxutazisasuloxezide.pdf In PDF document text
    • http://avtrak.ru/ckfinder/userfiles/files/sedeweri.pdfIn PDF document text
    • https://freedomtampons.com/wp-content/plugins/super-forms/uploads/php/files/d5a76da2b8c8576e6f74b0bf95cc3db4/94198268102.pdfIn PDF document text
    • http://gokea.org/upload/editor/files/mokokix.pdfIn PDF document text
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160f2f70bd6020---21637344313.pdfIn PDF document text
    • http://awkontrakt.pl/ckfinder/userfiles/files/15441137446.pdfIn PDF document text
    • http://brezov-gaj.si/uporabnik/file/26627412073.pdfIn PDF document text
    • https://palcev.ru/userfiles/file/4690247104.pdfIn PDF document text
    • https://diversifiedhumansolutions.com/wp-content/plugins/super-forms/uploads/php/files/8a4c3815ce10aada329750387e85f84e/vimozoxolabivutorokijip.pdfIn PDF document text
    • https://olgapopovaphoto.com/wp-content/plugins/super-forms/uploads/php/files/3162b442b4679d09f6a4d3ae44061435/87744410013.pdfIn PDF document text
    • https://www.grandiosa.is/wp-content/plugins/super-forms/uploads/php/files/pdmajo6vb4a0h8bo1j0t6rr2e1/17638530303.pdfIn PDF document text
    • http://artside.org/data/temp/file/26981557535.pdfIn PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/8f28361320a2d45d5dd97014293beea9/vuziwago.pdfIn PDF document text
    • https://thewentworthco.com/wp-content/plugins/super-forms/uploads/php/files/k0d8qfhlufkm6u0koegnka5l6e/zatetemigewa.pdfIn PDF document text
    • https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afb1e723b58---18127425890.pdfIn PDF document text
    • https://www.psalighting.com/wp-content/plugins/super-forms/uploads/php/files/e7429b3ca97bc1f2e1ce73f7dc433fc3/lemojufapofikej.pdfIn PDF document text
    • http://apartmaji-zunicmile.com/uporabnik/file/karodikofinorom.pdfIn PDF document text
    • http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608059f5c5003---71101094951.pdfIn PDF document text
    • http://www.tobywells.org/media/fckdir/file/fogolanazajozibujigelew.pdfIn PDF document text
    • http://pavcargo.ru/wp-content/plugins/super-forms/uploads/php/files/2e68f2381cd5814fb965efaae570c76a/67534831892.pdfIn PDF document text
    • http://takeacode.net/user/d41d8cd98f00b204e9800998ecf8427e/file/12604402730.pdfIn PDF document text
    • http://synergytaekwondo.com/click2buy_newp/userfiles/file/79399510821.pdfIn PDF document text
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f1f547573dc---ludenenobasapabajir.pdfIn PDF document text
    • http://www.urbanwaterways.info/files/50753108718.pdfIn PDF document text
    • http://villaturri.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608e681a0b37d---57852215721.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=how+to+pair+x8+earbudsPDF 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_off0000eae9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAE9 17180 bytes
SHA-256: 6210e64a2a46909a3afa360542e3b4e4c8638c528fc9454aaa0e73292e03cfd2
font_01_sfnt_off000117ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117AE 1760 bytes
SHA-256: 478d64aad58a46c60a63c2bd6d05d9c39068b35528f549688063ac651822ff24
font_02_sfnt_off00012009.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12009 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00013820.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13820 10860 bytes
SHA-256: a6482374dc595333d87a27cee126c9e27f59b5604f938d1ac9d5780ee19a5a2e

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