Malicious PDF — malware analysis report

Static analysis result for SHA-256 540ac6f04b9301ea…

MALICIOUS

PDF

184.1 KB Created: 2021-06-26 17:27:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f58bb3cf36e9f7fd22f24dd9b2d8242d SHA-1: f68e65ea29e0b1cc329358d6c0eec243815321ba SHA-256: 540ac6f04b9301ea797342681be7467327dcd81a81ee2b4aa3aaa1f38711d4dc
196 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting a link farm designed to distribute malicious content. The heuristic 'SE_ADVANCE_FEE_SCAM_LURE' strongly indicates the document's purpose is to deceive users with fake prize or delivery notifications to extract money. ClamAV detection further confirms its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9906

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 https://www.properties-thassos.com/wp-content/plugins/super-forms/uploads/php/files/al6ej6ltv3q31ousn72r5booh1/wigulusumazojexipedelino.pdf
    • https://luminex.pl/upload/file/valoro.pdf
    • http://teleinwestor.com/userfiles/file/80675498695.pdf
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/435189bf4ca2078f727d41f50bce6728/54317962221.pdf
    • http://melissajacksonmd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609411fb82156---44951032243.pdf
    • https://aradmissions.com/ci/userfiles/files/motarexewumukogaxifurif.pdf
    • http://harasim.cz/uploaded/files/buzokubalik.pdf
    • https://latework.cz/soubory/guroboletiroz.pdf
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a24a22995d6---jaluzabizexefidewej.pdf
    • http://southportrubbish.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074cb5f009e8---23519890924.pdf
    • http://geology.ie/wp-content/plugins/formcraft/file-upload/server/content/files/1609deac5d1f74---mopodivasogaputolegonam.pdf
    • http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d18f9e32477---sijuzodizalosokori.pdf
    • http://www.lauricedale.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1609885711f375---56749133863.pdf
    • https://wilsonbarrera.com/inicio/wp-content/plugins/formcraft/file-upload/server/content/files/16070c2957170e---kekotelosoludawoguson.pdf
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb5f7ccb06---76479453190.pdf
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/1608fe546850a3---70379191998.pdf
    • http://xn--80aaeiengkwpz6p.xn--p1ai/pub/file/27415321623.pdf
    • http://begemot-rus.com/uploadfiles/file/2021043002002273499.pdf
    • http://global-poseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f4cc358fc6---46865582047.pdf
    • https://cowichanseniors.ca/userfiles/file/7948781942.pdf
    • http://sosnovgeo.ru/userfiles/file/fedapunigelaz.pdf
    • https://wpsqld.com.au/wp-content/plugins/super-forms/uploads/php/files/d9dd995e9eac34c69fb82b833a0a4ede/19462791462.pdf
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8e0a28ac6a.pdf
    • http://svenstavik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8e3588072b---10694660517.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=why+was+draco+malfoy+the+owner+of+the+elder+wand
    • 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_off00027118.bin
069a9ecbb138a31d7c607a2771ed8fd6ec861b8522998d15179d1ea6dd847a3f
pdf-font-stream PDF embedded font (sfnt) at offset 0x27118 17824 bytes
font_01_sfnt_off00029f9f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x29F9F 16792 bytes
font_02_sfnt_off0002b7b6.bin
881e5578aaeb860c1405c24580ffc64b3288f67dd2e09f68dbc31d453b837084
pdf-font-stream PDF embedded font (sfnt) at offset 0x2B7B6 10844 bytes