Malicious PDF — malware analysis report

Static analysis result for SHA-256 8acf15b7dc4fe3d4…

MALICIOUS

PDF

80.7 KB Created: 2021-09-01 06:01:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 94af585d0cfe9d0a0683e197b309b1d7 SHA-1: a49a6f45a53916244549f9368e61cff7c2af528e SHA-256: 8acf15b7dc4fe3d42c5c2184c8d1237807199fa43cbadd9c26400090814212c9
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. It contains numerous links to compromised websites and exhibits characteristics of a link farm, likely intended to redirect users to malicious content or facilitate further downloads. The presence of a 'download button' lure further supports a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://drafthe.ru/uplcv?utm_term=how+to+install+lspdfr+callouts PDF link annotation
    • http://wakesup.org/userfiles/file/93443014244.pdfIn PDF document text
    • https://fundacionamigosdelmarcaribe.ong/ckfinder/userfiles/files/79883188502.pdfIn PDF document text
    • https://a2designbg.com/userfiles/file/xukonabodu.pdfIn PDF document text
    • http://goodtraefarm.com/ckupload/files/87336474768.pdfIn PDF document text
    • http://baybayankaauamo.com/clients/c/c9/c9e0f772d4a556598cfa564a27137582/File/53604310672.pdfIn PDF document text
    • http://ttlengenharia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160790be2c1979---88899876618.pdfIn PDF document text
    • https://transilvaniafishing.ro/app/webroot/files/userfiles/files/33732855986.pdfIn PDF document text
    • https://www.tyrtaios.gr/ckfinder/userfiles/files/derirazafupolurix.pdfIn PDF document text
    • http://vickerycarpet.com/uploads/images//files/30044628927.pdfIn PDF document text
    • https://www.opdrrustukalac.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e1cf4e54c7c---93101721745.pdfIn PDF document text
    • https://www.havanasalsa-dance-tours.com/wp-content/plugins/super-forms/uploads/php/files/f5c0257f86312c022806993b41a411dd/ruwozinatiso.pdfIn PDF document text
    • http://tdvvietnam.vn/webroot/img/files/sijekelafibiraza.pdfIn PDF document text
    • https://fullgame.hu/uploads/files/sovipezotuzogajepaki.pdfIn PDF document text
    • http://jfe.hk/userfiles/sikenesolotoraxu.pdfIn PDF document text
    • https://www.beadvised.co.uk/wp-content/plugins/super-forms/uploads/php/files/a0d5d63da2f399eeb1365458d0909f9f/wijal.pdfIn PDF document text
    • http://bagiez.com/userfiles/file/kedadedenerakadi.pdfIn PDF document text
    • https://masterok-kovka.ru/wp-content/plugins/super-forms/uploads/php/files/8a69ee04dc70a1ccef41b22a30460e9c/didowiberugobukuzar.pdfIn PDF document text
    • https://www.karelo.com/uploads/File/78890581951.pdfIn PDF document text
    • http://vanillasky-ch.com/images/files/febimorokigumix.pdfIn PDF document text
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160be69d78f95c---ranuvujujabokok.pdfIn PDF document text
    • https://aakritidigitals.com/userfiles/files/96944621235.pdfIn PDF document text
    • http://intrinhgia.com/admin/webroot/upload/image/files/90589165889.pdfIn PDF document text
    • http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160adc73bd3c44---59427590209.pdfIn PDF document text
    • https://htapigroup3.com/contents//files/4793507395.pdfIn PDF document text
    • http://tlxzkj.com/uploads/file/201830528954.pdfIn PDF document text
    • http://argra.rs/wp-content/plugins/formcraft/file-upload/server/content/files/16111c2ca26762---wonutavonezewujekewakexu.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_off0000d6a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6A3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000eeba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEBA 10656 bytes
SHA-256: d080cbb3ffdd375b2f78aa4785bf4d80a98633d7a65fd8e88ea9a75002fc241c
font_02_sfnt_off00010742.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10742 17796 bytes
SHA-256: 6310d96fcd747c1e483b0ec545777f1c309f752fec413f7e12cdb26a6842306a

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