Malicious PDF — malware analysis report

Static analysis result for SHA-256 d00005c5493ffe09…

MALICIOUS

PDF

81.5 KB Created: 2021-09-16 07:17:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: 25d55d5c71de185ce96deb2d6ec51770 SHA-1: 6ea2f3961e8a622a71be2e3e3ef9adb1de04511c SHA-256: d00005c5493ffe09f9c161671f08b8867e909dd56832993a8600ea2fc3804480
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document exhibits characteristics of a phishing lure, indicated by the presence of a link farm pointing to multiple disposable domains and compromised CMS upload storage. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were directly extracted, the PDF structure and embedded URLs are indicative of an attempt to redirect users to malicious content, likely for credential harvesting or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://ketchas.ru/uplcv?utm_term=cain+and+abel+android+apk PDF link annotation
    • http://peoplefineart.com/assets/202109/files/20210909024825817737.pdfIn PDF document text
    • http://yizhu580.com/ckfinder/userfiles/files/gosipakadu.pdfIn PDF document text
    • http://demirlermetal.com/resimler/files/59712160322.pdfIn PDF document text
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141a4553656a---botobiwurigabelaxonof.pdfIn PDF document text
    • http://silver.jo/ckfinder/blanc/files/93784057846.pdfIn PDF document text
    • http://ediljolli.com/userfiles/files/nobaxabizaliw.pdfIn PDF document text
    • http://sushigonewildtogo.com/uploads/files/xitabulidizomowukero.pdfIn PDF document text
    • https://arihantgranites.in/wp-content/plugins/super-forms/uploads/php/files/9a04a326bf5a89ca81ea35b9d1c6d46e/53322287052.pdfIn PDF document text
    • https://777mto.org/contents/files/72658667895.pdfIn PDF document text
    • https://highlander-inn.com/assets/userfiles/files/24310270103.pdfIn PDF document text
    • http://www.impactit.in/ckfinder/userfiles/files/20707693188.pdfIn PDF document text
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/161303e88df9bf---36532524337.pdfIn PDF document text
    • https://www.lorenzofranzone.it/wp-content/plugins/super-forms/uploads/php/files/4dba1c31d056da06dab4b981b021cb7e/nafadanulatedora.pdfIn PDF document text
    • http://szerecsen.hu/editor_up/zetulisodimu.pdfIn PDF document text
    • http://bjerkelunden.org/content/files/userfiles/file///70354719290.pdfIn PDF document text
    • http://topoint.cc/userfiles/fckFile/20210914014531.pdfIn PDF document text
    • https://horgaszvelem.elelmiszer-hazhozszallitas.hu/ckfinder/userfiles/files/89175363665.pdfIn PDF document text
    • http://turystyka.powiatlubartowski.pl/admin/ckfinder/userfiles/files/5762821848.pdfIn PDF document text
    • http://sacoorhealth.pt/site/upload/file/48532100104.pdfIn PDF document text
    • http://bestbuyfromindia.com/userfiles/file/xewitigubezurejuxolokib.pdfIn PDF document text
    • http://gift-founder.com/archive/upload/files/saxemudobixuti.pdfIn PDF document text
    • https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613016d4d8138---fanoziwi.pdfIn PDF document text
    • http://whkmradio.com/userfiles/file/fumisokedu.pdfIn PDF document text
    • http://nickels.design/ckfinder/userfiles/files/49427315660.pdfIn PDF document text
    • https://aynadakikemalizm.com/resimler/files/76640825384.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_off0000d9c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9C4 18096 bytes
SHA-256: db7db9509a95996770a1b7b0ae8b1e9627113cc08e1e4f0ec3b734361ddaa592
font_01_sfnt_off000108be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108BE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000120d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120D5 10384 bytes
SHA-256: 8b5846661525ad1869e72392bc636b352fea6d820288f012940d747553cc1d2e

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