Malicious PDF — malware analysis report

Static analysis result for SHA-256 f07c93c763da16c5…

MALICIOUS

PDF

68.1 KB Created: 2021-10-01 03:52:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: e22aaace177f164a653eee09b2235d8c SHA-1: 9d7f549d341420b3848536e70119d88e9482cccf SHA-256: f07c93c763da16c5613cde76fa160a5d93ca9bd0a73a5ef61c76dab449a48098
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many hosted on compromised WordPress sites or disposable domains, suggesting a link farm used for phishing or malware distribution. The 'PDF_IMAGE_LURE' heuristic indicates it's likely an image-based document with an action trigger, a common tactic for disguising malicious links. ClamAV detection and ML classification further support its malicious nature, pointing towards a phishing or trojan distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 68 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://chcial.ru/uplcv?utm_term=how+to+download+youtube+videos+for+free PDF link annotation
    • https://papiratisk.cz/soubory/mopexetiwipemimukuxe.pdfIn PDF document text
    • https://autotrilogy.com/wp-content/plugins/super-forms/uploads/php/files/f02d6104000ec23cc56ca26df5177fa5/dorumux.pdfIn PDF document text
    • https://girilawfirm.com/content_files/files/35273332742.pdfIn PDF document text
    • http://annamsaigonlaw.com/upload/files/41093624549.pdfIn PDF document text
    • http://studiomontironi.eu/userfiles/files/92684270324.pdfIn PDF document text
    • https://jogamiskolc.hu/ckfinder/userfiles/files/9288285977.pdfIn PDF document text
    • http://lepixz.com/userfiles/file/bilusobi.pdfIn PDF document text
    • http://madiagranitosilano.it/userfiles/files/49545638487.pdfIn PDF document text
    • http://jevades.com/aircraft/fckimages/file/wolikadijuziravezejavegu.pdfIn PDF document text
    • https://www.c2commercial.com/wp-content/plugins/super-forms/uploads/php/files/424ece10a9920ce435d5419d813fdcbc/46795890463.pdfIn PDF document text
    • https://onecre.com/images/content/files/rigigasatisabozepafozuteg.pdfIn PDF document text
    • https://atamergranit.com/userfiles/file/zuparazitaji.pdfIn PDF document text
    • https://inprovitperu.com/ckfinder/userfiles/files/70051819362.pdfIn PDF document text
    • https://realimpacto.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1615424927595d---bodipejotafunelakar.pdfIn PDF document text
    • http://wellogo.in/userfiles/file///gewezaroderitivuduvitej.pdfIn PDF document text
    • http://absolutelyneon.com/userfiles/file/roranatapawenunore.pdfIn PDF document text
    • http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/161528b6c4981e---bepopafalimib.pdfIn PDF document text
    • http://www.mkkdigital.pt/wp-content/plugins/formcraft/file-upload/server/content/files/1615304c765162---nujevomowugijemojeza.pdfIn PDF document text
    • https://www.mftelhas.com.br/adm/Editor/ckfinder/userfiles/files/75116561682.pdfIn PDF document text
    • http://eichler-kammerer.de/73722238918.pdfIn PDF document text
    • https://newtop-eg.com/userfiles/file/wuxefatugirazaneto.pdfIn PDF document text
    • https://sunnyvale.com/wysiwygfiles/file/karawoseja.pdfIn PDF document text
    • https://hirurgija.me/files/15461464196.pdfIn PDF document text
    • http://shengnabei.com/uploadfile/file///2021091121252067.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_off0000af3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF3A 10844 bytes
SHA-256: 870d0da9ab51c6dc089f56c3484339d1a7c044c687bd9fa6525e55675de932b3
font_01_sfnt_off0000c86c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC86C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e07e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE07E 13784 bytes
SHA-256: 84d73321dca9dab42fa00a6dbb1eb638c06d737fde8b92c0add3c1b54d02e134

Open this report in the interactive analyzer, or submit your own file for analysis.