Malicious PDF — malware analysis report

Static analysis result for SHA-256 dbd6de17ae8e58de…

MALICIOUS

PDF

82.9 KB Created: 2021-09-11 16:13:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 4ba0bbb1db30103301b1d55376a1f1d0 SHA-1: 211baa0e1ef569b0064d1f9a70f4f61a82974648 SHA-256: dbd6de17ae8e58de1ca8d33c039fa8c641d212a040ad1071bde1e66464f74ef6
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, and exhibits characteristics of an advance-fee scam. It contains numerous links to external PDF files hosted on various domains, suggesting it is part of a link farm designed to distribute malicious content. The presence of these links and the scam lure indicate the document's primary purpose is to trick users into downloading further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://rlponder.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/pinexoveki.pdf
    • http://sarigol.kr/userData/ebizro_board/file/44477236673.pdf
    • http://pho32shabu.com/uploads/files/55060995346.pdf
    • https://stijsr.com/userfiles/file/ludupexigalelam.pdf
    • https://www.andimoda.com/wp-content/plugins/super-forms/uploads/php/files/611ea4fe7e8bd20fcd606444debc8a5b/gelulexive.pdf
    • https://cvsc.co/userfiles/file/witefexaxobawuxetor.pdf
    • http://daegyung.kr/userfiles/file/20210902224625.pdf
    • http://energyexcess.com/userfiles/file/82658735314.pdf
    • http://thewellmanteam.com/userfiles/files/24478393124.pdf
    • http://chothuexeninhbinh.net/data/dulieu/files/xupukosuzotovokepaz.pdf
    • http://adec-interiors.net/Uploads/file/54165170372.pdf
    • http://caytrong.vn/Images_upload/files/62212226081.pdf
    • http://kelvista.lt/images/files/50695072282.pdf
    • http://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/1613b6b9602120---2568031187.pdf
    • http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/161312c53d60b8---53443993654.pdf
    • http://lionsmarsala.it/userfiles/files/firiwowajugenos.pdf
    • https://rivieresoceanie.com/ckfinder/userfiles/files/92220500465.pdf
    • http://compsult.net/userfiles/file/nijinedezudaludazuzakiz.pdf
    • http://makaroma.fr/upload/file/xexolepipagoge.pdf
    • https://sindhuinvestment.com/ckfinder/userfiles/files/72394829129.pdf
    • http://charivne.info/images/file/77391336255.pdf
    • https://ehlibeytalimleri.com/resimler/files/52225884275.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=silence+phone+at+night+android
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df0d.bin
146a32f9e369aa70c019a6428b38da4d9d649971db9b026f2885cb86d58d61e7
pdf-font-stream PDF embedded font (sfnt) at offset 0xDF0D 17960 bytes
font_01_sfnt_off00010dc1.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10DC1 16792 bytes
font_02_sfnt_off000125d8.bin
0c4773a4a1add02695b639ccc7540d9c828c7150a793dd29af768c89b2f1922f
pdf-font-stream PDF embedded font (sfnt) at offset 0x125D8 10700 bytes