Malicious PDF — malware analysis report

Static analysis result for SHA-256 faea840e86f1e62d…

MALICIOUS

PDF

155.6 KB Created: 2021-07-03 05:12:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 18a134b1801ec85f964053c5fb90877c SHA-1: 3c9830daaac325b19be865fe9a16ff040c70f24a SHA-256: faea840e86f1e62dba1d1d4001fe42da2a57aca7454fa9750bcba24ef1002b45
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 heuristics indicate it is an advance-fee scam lure. The document body is heavily obfuscated, but the presence of numerous links to potentially compromised WordPress sites suggests a phishing or malware distribution attempt. No scripts were extracted, but the PDF structure and link farm indicate a malicious intent to deceive the user.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9913

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://beckydavidsonhomes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608cc6d9ce452---vuwizijibel.pdf
    • https://energooptima.hu/upload/File/fukefupizud.pdf
    • https://q-web.ro/wp-content/plugins/super-forms/uploads/php/files/ernlm1d1295ljobn86r53h737r/19802744191.pdf
    • http://www.pianoszimmermann.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160aa6b3a4e94b---18154748576.pdf
    • http://www.rpv-drachten.nl/files/file/56101193154.pdf
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/16095aa65a5303---40259290134.pdf
    • http://phillipsbricksalumni.com/clients/56168/File/59432079844.pdf
    • http://nutronicltd.com/userfiles/file/baroletipasefudujokokab.pdf
    • http://salonlomi.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1609542687154d---80099242454.pdf
    • https://envomask.com/wp-content/plugins/super-forms/uploads/php/files/5f2ed33685939e2718edbc62e270924e/luluverepejines.pdf
    • http://hondaototanan.com/upload/files/67573251961.pdf
    • http://asesorgubernamental.com/images/file/laburirosusiw.pdf
    • https://www.marthatrotts.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a1a51f3a94a---fexubitedeb.pdf
    • https://shinyjewellers.com/wp-content/plugins/super-forms/uploads/php/files/8qourf0m7decm3n44od0sofahh/xusibojotekebubewofejitex.pdf
    • https://transcendenceit.com/wp-content/plugins/super-forms/uploads/php/files/a945c6d58d5c33aa7f91c2d6f44b9fa4/45193810984.pdf
    • http://royalwedding.jp/images/blog//file/47824092661.pdf
    • http://www.fattyweng.com.sg/wp-content/plugins/formcraft/file-upload/server/content/files/1606c92071a68f---tirudewineponeneba.pdf
    • https://stpetejazz.com/wp-content/plugins/super-forms/uploads/php/files/rub895lqbc1blmdlpgn7dj33fe/telinojuxasutedidotelere.pdf
    • http://allmedicus.com/userfiles/file/jojosivanidiwosexitob.pdf
    • http://commune-bourre.com/userfiles/file/37720323747.pdf
    • http://www.191seo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089d7cacf9bb---26701824957.pdf
    • http://alphabodysupplements.com/newerac2c/userfiles/file/28759968319.pdf
    • http://johncarroll1967.com/clients/1/18/1896e795ecc2602204d707ec4e69586f/File/65103611141.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=business+of+the+21st+century+pdf+download
    • 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_off0001fd8d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1FD8D 16792 bytes
font_01_sfnt_off0002159f.bin
51f940dba97ca8815862d4df273d4b141ba828d2de29363a3d6877defb0e7864
pdf-font-stream PDF embedded font (sfnt) at offset 0x2159F 18592 bytes
font_02_sfnt_off00024641.bin
1ef299280843c2d63a3412ea65d7712309b1af8afe1a7c64314ad5646d782f8e
pdf-font-stream PDF embedded font (sfnt) at offset 0x24641 11244 bytes