Malicious PDF — malware analysis report

Static analysis result for SHA-256 ccb682c45a630a8a…

MALICIOUS

PDF

74.5 KB Created: 2021-07-25 05:51:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: dfef23800390159082a53dda685220d7 SHA-1: 0689efeb7dfce97d0f0996e4a7c5165c9972413f SHA-256: ccb682c45a630a8a8d3c7ee45a0316ee8d19bdf4c5e1e09d49e8f3720b7d3729
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous links pointing to compromised WordPress upload directories, suggesting a tactic to host malicious content or redirect users to phishing sites. The presence of these links indicates an attempt to exploit users by directing them to potentially harmful external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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 http://www.doctor-carpet.com/wp-content/plugins/super-forms/uploads/php/files/uv2k0tob2ihj0013l7s7ldc262/gejotigol.pdf In PDF document text
    • https://www.swx.global/wp-content/plugins/super-forms/uploads/php/files/79ee593854c87fa99ad474f7e1f1b28e/nibumo.pdfIn PDF document text
    • http://ed-web.cz/userfilesfile/xofexutegetozokisurififok.pdfIn PDF document text
    • http://canxetaidientu.com/images/file/20147846310.pdfIn PDF document text
    • http://uro-medical.pl/zdjecia/fotki/file/59282904527.pdfIn PDF document text
    • http://parkhighclassof60.com/clients/871169/File/zowulofiseg.pdfIn PDF document text
    • http://xn--80aaffebba2apgigwiiececnggk9e4k.xn--p1ai/pict/file/40395317678.pdfIn PDF document text
    • http://manavpublicschool.org/manav/userfiles/file/nokibaxonufinusipazigodiv.pdfIn PDF document text
    • http://0-50.ru/userfiles/file/barorularurijesivuti.pdfIn PDF document text
    • https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1608d95ce6d0d1---59296695687.pdfIn PDF document text
    • http://herodumpsterrental.com/wp-content/plugins/super-forms/uploads/php/files/366b1412c201c5c8312e7d7a6808b511/54939743978.pdfIn PDF document text
    • https://irantruck.ir/data/file/98582526345.pdfIn PDF document text
    • http://extracam.es/app/webroot/arxius/file/33477434194.pdfIn PDF document text
    • http://huron81reunion.com/clients/f/fe/feec28e48c841af8be4ad6373737a022/File/vesukekanutano.pdfIn PDF document text
    • https://www.reliancecareuk.com/wp-content/plugins/super-forms/uploads/php/files/d417b10b9d287c52b08511f0c9aebf66/vaniterisujiwopazipibeta.pdfIn PDF document text
    • https://xn--i1aam8cb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/2203895e2cb7173d8e67bdee21e247bf/7905345458.pdfIn PDF document text
    • https://weinquartier.at/wp-content/plugins/super-forms/uploads/php/files/ff5006cbd236e5fd83e8bf17fa4fae7c/zutupabojikapewufit.pdfIn PDF document text
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/3o5hfs72o07n93hgml2f6k4a51/17863434163.pdfIn PDF document text
    • http://stensoproject.com/userfiles/files/fagol.pdfIn PDF document text
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16072b86502a7c---kipebala.pdfIn PDF document text
    • https://skazkavdom.com/wp-content/plugins/super-forms/uploads/php/files/d4092c5c059d8603205c0f157c6b5d55/34231670109.pdfIn PDF document text
    • http://workprohealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ab9605ae31---62289574702.pdfIn PDF document text
    • http://ebslang.net/_UploadFile/Images/file/8872350648.pdfIn PDF document text
    • http://nguyenthaotech.com/upload/files/bajoju.pdfIn PDF document text
    • https://hacunamatata.ru/wp-content/plugins/super-forms/uploads/php/files/031db0e9ed95cef9e5f1a262643b0907/xugupapukuder.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=microsoft+word+rubber+stamp+templatePDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c31a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC31A 10996 bytes
SHA-256: fda1e3633ad82be3e639f506be0a5c4a91dbe436ce78d0baa368e51ee8992bfe
font_01_sfnt_off0000dc8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC8D 15524 bytes
SHA-256: 96787faaa78f5bca87c69c339899ff1bf8659f9165554db31c14c434a3a0a408
font_02_sfnt_off0001046a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1046A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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