Malicious PDF — malware analysis report

Static analysis result for SHA-256 e64ff3167a58d98b…

MALICIOUS

PDF

79.3 KB Created: 2021-06-20 14:37:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 61e0fa0924f912819378eb60ab4e4cce SHA-1: 77d1f1c198673dea18a71915ac5c099772f1bfe1 SHA-256: e64ff3167a58d98bffa4ab42d787364f4987938c75b0dc2bbbfae364721f20da
196 Risk Score

Malware Insights

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

The PDF document exhibits characteristics of an advance-fee scam, as indicated by the 'SE_ADVANCE_FEE_SCAM_LURE' heuristic. It contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting an attempt to redirect users to malicious content. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://drafthe.ru/uplcv?utm_term=unearned+rent+is+what+type+of+account
    • http://lncxjzxxw.com/upload_fck/file/2021-5-19/20210519082457435120.pdf
    • https://www.hontoys.com.au/wp-content/plugins/super-forms/uploads/php/files/g31hhetia4ppofr4jh83luvu3l/lufibif.pdf
    • https://phoenixknights.co.uk/wp-content/plugins/super-forms/uploads/php/files/1d0b16d539b57c71142c8ad390be2809/wovunu.pdf
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/16082c39cbf71b---81356041426.pdf
    • http://beastyenergy.com/userfiles/file/70108679818.pdf
    • http://xaydungphongphu.com/uploads/files/jugidupuje.pdf
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16073f1634dfef---92264503947.pdf
    • https://tehnol.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607c1be2311a4---63085424636.pdf
    • http://rufullthrottle.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c0d7a83eca---75041735849.pdf
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bbbedbcd15c---72212605891.pdf
    • http://altelaw.com/uploads/image/file/reloped.pdf
    • https://benjamindreyer.com/wp-content/plugins/super-forms/uploads/php/files/3178c15c0439e841968722060dbd3e26/34510271394.pdf
    • https://southtours.com/wp-content/plugins/super-forms/uploads/php/files/quu6oedimlabqtp8d3rrf3jskb/42827389200.pdf
    • https://dalnoboy.com/data/filestorage/upload/files/vawixejexutozesowu.pdf
    • https://hopefor.today/wp-content/plugins/super-forms/uploads/php/files/eb0383f4386a8ae8fe58c5288a6c2f33/77660839377.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • 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://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ebd9.bin
fae45ef550707c4f5838fa0ede62b5477779563a96c5a0908484fc32a6ff3608
pdf-font-stream PDF embedded font (sfnt) at offset 0xEBD9 5276 bytes
font_01_sfnt_off0000fdd7.bin
99399cf4d675ca7063850ae6727603bba0435313e24bb427ac058f24a924ac9a
pdf-font-stream PDF embedded font (sfnt) at offset 0xFDD7 10640 bytes
font_02_sfnt_off0001220d.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3
pdf-font-stream PDF embedded font (sfnt) at offset 0x1220D 4324 bytes