Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e6f007b6c5ad463…

MALICIOUS

PDF

81.9 KB Created: 2021-09-23 08:34:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 56820241b4c5d7fcda2729a05a56292e SHA-1: 1a71b49ae5dcf8ad2b16986ed28f64645c65466a SHA-256: 9e6f007b6c5ad463664a0084b18b84d2aae1192df16e7aca7389a272c6880f3e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of external URI heuristics and link farm indicators strongly supports a phishing or SEO poisoning attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://laborke.ru/uplcv?utm_term=can+iphone+track+android+location PDF link annotation
    • https://bizdrive.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/161412df9c6e33---zafuxoxilatugepuvasud.pdfIn PDF document text
    • https://zivotzaokny.eu/res/file/megubobomamokitatugewonog.pdfIn PDF document text
    • http://worksafeorg.com/wp-content/plugins/super-forms/uploads/php/files/4h7449kialjrbt0dnulcg26n12/13882998367.pdfIn PDF document text
    • https://acryl-bg.com/userfiles/file/dasilalovunafe.pdfIn PDF document text
    • http://safiorida.nl/operatori/userfiles/file/difidawixagosekila.pdfIn PDF document text
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16135839fbe5b7---20616462260.pdfIn PDF document text
    • http://studioesflores.pl/obrazy/file/xetofal.pdfIn PDF document text
    • http://absolutelyneon.com/userfiles/file/ruxelereposukik.pdfIn PDF document text
    • http://daltan.hu/userfiles/file/75961951469.pdfIn PDF document text
    • http://eyela.kr/uploadfile/fckeditor/file/vojusugor.pdfIn PDF document text
    • https://bliznacite.dvsportbg.com/files/duxovuboxuxil.pdfIn PDF document text
    • https://radio-clipa.ro/userfiles/file/vororajipijomalusozawisan.pdfIn PDF document text
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d60411ad53---kariwubivanul.pdfIn PDF document text
    • http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ab003c8e65---sukomusuguvafaworowikiv.pdfIn PDF document text
    • http://mabifitness.it/userfiles/files/xaninibum.pdfIn PDF document text
    • http://coquicart.com/ckeditor/ckfinder/core/connector/php/uploads/files/57557588885.pdfIn PDF document text
    • http://gruaszarate.com/ckfinder/userfiles/files/54933152015.pdfIn PDF document text
    • http://hk-bbc.com/upload/file/vuxejafinomijuru.pdfIn PDF document text
    • https://apz-arte.com/ckfinder/userfiles/files/rutaduzixu.pdfIn PDF document text
    • https://asiantms.com/ckfinder/userfiles/files/nukepejigapow.pdfIn PDF document text
    • https://washlounge.in/ckfinder/userfiles/files/vukevizirasarotasepikini.pdfIn PDF document text
    • https://ruh-center.ru/userfiles/file/giwezunefi.pdfIn PDF document text
    • https://dianthusindustrial.com/resimler/files/mozubupufu.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_off0000db5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB5C 18016 bytes
SHA-256: d2ae3ac33eef000ebb55193eafbc395bd321d7b5b5024fcc7966387cb40d2fbf
font_01_sfnt_off000109bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109BD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000121d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121D4 10568 bytes
SHA-256: 1cfb36ba4209dc850c09646ce2c6b82e11c99353d3ca9e103f81af986d30b74b

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