Malicious PDF — malware analysis report

Static analysis result for SHA-256 cdb6df3d360f60f6…

MALICIOUS

PDF

87.2 KB Created: 2021-09-19 03:20:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f77a360f15601a442ef62619f6442903 SHA-1: a9b699d4903b81905d9fbe685b0b1c30e82e3fd2 SHA-256: cdb6df3d360f60f6408cac6e72837d77195418742eee8117b1e6ae0993bb09aa
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF containing embedded JavaScript, which is a common technique for delivering malicious content. Heuristics indicate it functions as a link farm, with many URLs pointing to compromised WordPress sites and disposable hosting, likely to disguise the true destination. The 'SE_ADVANCE_FEE_SCAM_LURE' heuristic strongly suggests the document's purpose is to trick users into paying fees for a non-existent prize or parcel, aligning with phishing and advance-fee fraud tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

Heuristics 8

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://fjordancv.info/wp-content/plugins/super-forms/uploads/php/files/cb470fae694c57c72b4398c89a21d51b/vovadewo.pdf
    • http://whatcanidoforyou.eu/publish/file/wugivoforoverog.pdf
    • https://073741256.com/uploads/files/202109071605401661.pdf
    • https://marathonlaval.com/userfiles/files/99996012044.pdf
    • http://baoveantam.org/upload/files/mojubojulukuvosalabegumuw.pdf
    • http://shannonlakeestates.org/fck_images/file/74094032574.pdf
    • https://growmytruck.com/wp-content/plugins/super-forms/uploads/php/files/3ec44316375a243c6223ba564cff2c6c/63420465067.pdf
    • http://ilkconstruction.com/Images/Media/files/95694926024.pdf
    • https://zahrek.com/userfiles/file/marizodaxoxurafi.pdf
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/161317ff61f122---pexerutodaj.pdf
    • https://illustrations.noche.fr/images/files/46459767738.pdf
    • http://www.phsdcenter.com/temp/js/ckfinder/userfiles/files/batubasipavewetiropobo.pdf
    • http://singlesync.com/userfiles/file/33134221417.pdf
    • http://krevue.cz/UserFiles/File/navekujugexiv.pdf
    • http://linkingpeople.info/userfiles/file/74372966602.pdf
    • https://anmimar.com/royal/userfiles/file/21011919005.pdf
    • http://huyminhplastic.com/upload/files/duvijupegoxisenatawefep.pdf
    • https://penzion-pod-rozhlednou.cz/img/file/81107090158.pdf
    • http://ourconn.com/userfiles/file/202109111130573160.pdf
    • http://spellenindex.nl/images/uploads/39644902851.pdf
    • https://krainaogrodow.eu/zdjecia/fck/file/70264753736.pdf
    • https://skopjemuzikon.pmgrecordings.com/ckfinder/userfiles/files/8146296860.pdf
    • http://architettoseneca.com/userfiles/files/nutimixu.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=new+release+tamil+movies+2021
    • 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_off0000ee5a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEE5A 16792 bytes
font_01_sfnt_off00010671.bin
46f649c64d8bfb2d9d566ad775214cd264312ce9a844d816c9054566e0979bc1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10671 10588 bytes
font_02_sfnt_off00011ecd.bin
34ca35dae4527164c4b16848722994057fbee6b55004505b930283f3985cdafb
pdf-font-stream PDF embedded font (sfnt) at offset 0x11ECD 18668 bytes