Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1801a6057a0ea65…

MALICIOUS

PDF

68.7 KB Created: 2021-09-29 04:55:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 49ad3bfeb17fbf3f22ac5ac2ec4b4550 SHA-1: 79f4af4840394e8d67d53f718bcc06e7e5c49015 SHA-256: c1801a6057a0ea65b27f2c563824494b46535e1ab0c4b0d7b605d7944e29ea95
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is identified as malicious by ML classifiers and ClamAV, exhibiting characteristics of a phishing lure. It contains numerous links pointing to potentially compromised websites and disposable hosting, suggesting an attempt to redirect users to malicious content. The PDF structure and embedded links indicate a likely spearphishing attachment, aiming to deliver a payload or phish credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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 1 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://pixomot.ru/uplcv?utm_term=prawn+paste+fried+chicken PDF link annotation
    • http://pantanalmsnews.com.br/ckfinder/userfiles/files/kasotewotijujigerimefaj.pdfIn PDF document text
    • https://bloomland.com/sites/bloomland.com/files/66789562187.pdfIn PDF document text
    • http://osstemcardiotec.com/files/fckeditor/file/17046198726130b549c36cc.pdfIn PDF document text
    • https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141b8db8919d---48323816722.pdfIn PDF document text
    • http://www.fsnn.se/wp-content/plugins/formcraft/file-upload/server/content/files/16131092a25828---nixodidomebukalom.pdfIn PDF document text
    • http://vipavtoufa.ru/wp-content/plugins/super-forms/uploads/php/files/b7677914de2b0a7cc053af7e00cc30bf/16586108504.pdfIn PDF document text
    • http://zamgph.com/FCKeditor/editor/filemanager/connectors/php/uploads/file/271651374018.pdfIn PDF document text
    • http://dztechfin.com/upload/file///84320138730.pdfIn PDF document text
    • http://ibookingkr.com/FileData/ckfinder/files/20210906_00B70950CF1C4835.pdfIn PDF document text
    • https://firsatpin.com/calisma2/files/uploads/kibotomigabepepob.pdfIn PDF document text
    • http://qzgj.cn/upload/file/68758367132.pdfIn PDF document text
    • http://slovoveri.org/userfiles/80047895685.pdfIn PDF document text
    • https://csodamalom.hu/files/files/vazowivirepikaronowuli.pdfIn PDF document text
    • http://hongphuc.vn/userfiles/file/wulavajerexuzi.pdfIn PDF document text
    • https://sardavetri.it/userfiles/file/78130785179.pdfIn PDF document text
    • https://kuraniterbiye.com/resimler/files/fufizof.pdfIn PDF document text
    • http://jsdarvin.com/files/87262148656.pdfIn PDF document text
    • http://tcgardening.com/userfiles/file/2021092802480573499.pdfIn PDF document text
    • http://stluciachamber.org/uploadedImages/contentImg/file/15604772000.pdfIn PDF document text
    • http://turnyras.lt/Files/file/60233117608.pdfIn PDF document text
    • http://telegid.tv/userfiles/files/61623455009.pdfIn PDF document text
    • https://kingcarmotorista.net/uploads/files/fixofomelafezo.pdfIn PDF document text
    • http://saikunghouse.hk/userfiles/xeditoxeraratofujojep.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_off0000b0a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB0A1 14428 bytes
SHA-256: 01c1b7a59a7fac5a9bb18340f90ee15f1c02d5d38e442e7e7a612db47997ad85
font_01_sfnt_off0000d485.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD485 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ec9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC9C 10728 bytes
SHA-256: 4e3966bc0f692abe50d5fca5a1c6e3a08568662adfffc315ec3f12092abc7603

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