Malicious PDF — malware analysis report

Static analysis result for SHA-256 62aef88c8ac5e9f3…

MALICIOUS

PDF

85.6 KB Created: 2021-06-27 22:57:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 53715725371779b87518b19833d70a85 SHA-1: bbf708e6638d518bef81ef6ae18905d0213703e5 SHA-256: 62aef88c8ac5e9f34a9c620dbb20ea30bc78ea7045a1a5ca9876dc5e54e2955c
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ClamAV and an ML classifier, and exhibits characteristics of an advance-fee scam. It contains numerous links to compromised WordPress sites and disposable hosting, suggesting an attempt to distribute malicious content or phish for information. No scripts were extracted, but the document's structure and heuristic firings strongly indicate a fraudulent intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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 https://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/0e9bbe224aed9da9edea80ac79b1ad66/bugisakijagopodu.pdf
    • http://manavpublicschool.org/manav/userfiles/file/7165348175.pdf
    • http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/16085a0635613a---61894700251.pdf
    • https://www.lamuccacompany.com/wp-content/plugins/super-forms/uploads/php/files/2b78ba451cc16bb1931132cca0a36e43/85776739283.pdf
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/b971adab516dd77c42eb5763475a4651/venerukisilapasedon.pdf
    • https://www.chartsunlimited.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/1607226f916ba4---jexojiraxuvasobesogevero.pdf
    • https://hotelritariccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/16071f64567e64---8223184530.pdf
    • http://bfr-bialapodlaska.pl/userfiles/file/zozederezek.pdf
    • https://detectiveoffice.net/userfiles/file/zofisan.pdf
    • http://younewstoday.com/task/userimages/file/86453522869.pdf
    • https://aashianarealty.com/file/8596649665.pdf
    • http://whs1963.com/clients/7/75/758a827d59fb1c2827eec60421ffdc22/File/vituwumevugisalagupaxabab.pdf
    • https://www.basur-tedavisi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d5091a1394---damazuwekegikofa.pdf
    • https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/160af66d2c0efb---zanenupakukak.pdf
    • https://fishboat.hr/files/80697271878.pdf
    • http://suportti.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ce235f0857c---26736556026.pdf
    • https://bentzendesign.se/wp-content/plugins/formcraft/file-upload/server/content/files/160c1765baf500---lukazilekoko.pdf
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/160d422a67034d---tixadaradinozepil.pdf
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/1607fa10bb3196---15808658251.pdf
    • http://www.fullertherapy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b966a1f231d---94652533569.pdf
    • https://airbays.com/userfiles/file/zabog.pdf
    • https://nusantarabet4d1.com/contents//files/voxebijemeguxurafelo.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=pros+and+cons+of+mobile+phones+pdf
    • 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_off0000ebc1.bin
9f1870990ff05bad96ebeb75a3b4ce39e67fff77a52fd9db0d25ad38d1175fbc
pdf-font-stream PDF embedded font (sfnt) at offset 0xEBC1 10928 bytes
font_01_sfnt_off00010499.bin
f045f36ac7ee38c671f1fa5d841daafde51bf36a3a74eb069f5f8fff8010c7ab
pdf-font-stream PDF embedded font (sfnt) at offset 0x10499 17164 bytes
font_02_sfnt_off00013151.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13151 16792 bytes