Malicious PDF — malware analysis report

Static analysis result for SHA-256 423207aabacdd3bb…

MALICIOUS

PDF

87.0 KB Created: 2021-06-27 08:08:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f770557606188d27f586a98cd656ef01 SHA-1: 17ee96842e6fab693cdb13e6c4fa1dadd0a12fac SHA-256: 423207aabacdd3bbbdb2cdc45db40c6a854fe58cb15193ebbf6bed907b09232b
204 Risk Score

Malware Insights

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

The PDF file exhibits characteristics of an advance-fee scam, presenting lures related to lotteries, prizes, or parcel deliveries. It contains numerous links to potentially compromised websites, suggesting an attempt to redirect users to malicious content or downloads. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

Heuristics 8

  • 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.
  • 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://www.cfo-search.com/wp-content/plugins/formcraft/file-upload/server/content/files/160848be5d769c---12318833821.pdf
    • http://aclamerica.com/customers/CMS-IMAGES/file/mepusupaku.pdf
    • http://bochosushi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d40ba9b5da---46299636794.pdf
    • http://www.opencalgary.org/wp-content/plugins/formcraft/file-upload/server/content/files/160cd79b39f92b---95962107037.pdf
    • http://cbelmira.com/wp-content/plugins/super-forms/uploads/php/files/87o6cff374jhvtss1olvga8242/52565311286.pdf
    • https://psfund.org/public/uploads/files/cms_files/rideguwapexo.pdf
    • https://riverasphotovideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d956b744b1---gidevon.pdf
    • http://diagonal.org.ar/wp-content/plugins/formcraft/file-upload/server/content/files/160aa213304189---taxoxeweji.pdf
    • https://elitteaccesorios.com/wp-content/plugins/super-forms/uploads/php/files/tbk1gmq4v3pjj5d02prjgsi4gf/90461300901.pdf
    • http://antik-cafe-bergen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c5af8f4b56c---wemexofixo.pdf
    • http://steclotildehorton.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16099293c625f6---wanuvetesu.pdf
    • http://cottoneauto.it/userfiles/files/josat.pdf
    • https://aronabritcan.com/userfiles/file/24055584622.pdf
    • https://dongytueduc.com/wp-content/plugins/super-forms/uploads/php/files/e2qh8c10v3hhj72gfvemg5thja/95887441577.pdf
    • http://leton.pl/userfiles/file/98618097075.pdf
    • https://yziact.fr/wp-content/plugins/super-forms/uploads/php/files/89nueoqs3pr96cilemvqlgt40n/zosajozakeregebejafabu.pdf
    • http://tfforming.ru/d/files/59916337169.pdf
    • http://accessprecision.com/userfiles/file/11375642582.pdf
    • http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160856e10be8fa---norovobase.pdf
    • https://drainscovers.com/wp-content/plugins/super-forms/uploads/php/files/5273bbb6fe2a4e94567b99e220c0fe96/64210860229.pdf
    • https://precisionautoandac.com/wp-content/plugins/super-forms/uploads/php/files/7c645a64c3e08277101ba799379e77f7/zopekevilum.pdf
    • https://neavocats.com/wp-content/plugins/super-forms/uploads/php/files/ec37ac1d09e19693f9b15ba07bdb5d2d/kugilinosumafazuza.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=compress+my+video
    • 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_off0000f328.bin
9dd790440f200ed96a8ccf3e9a3762989e42401c3f76dd3c8e9e04919ddef467
pdf-font-stream PDF embedded font (sfnt) at offset 0xF328 17092 bytes
font_01_sfnt_off00011fd8.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11FD8 16792 bytes
font_02_sfnt_off000137ef.bin
2781c79405c6297c28d3ecc8dcf5427722918a5ec04121688080f8441c096923
pdf-font-stream PDF embedded font (sfnt) at offset 0x137EF 10352 bytes