Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb6b0efdf1cca746…

MALICIOUS

PDF

81.2 KB Created: 2021-09-13 22:10:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e63c199a8d6fe4e63165d74edce6e659 SHA-1: 5f75979dc28719c24880ce410f328f74af3ac9e7 SHA-256: fb6b0efdf1cca7461a7c22ab6491cdb29cb0d4316f536cabff74ccbe1a5ca627
196 Risk Score

Malware Insights

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

The PDF was flagged by multiple heuristics, including a high-confidence ML classifier and a specific rule for advance-fee scam lures. The document contains numerous links pointing to compromised CMS upload directories and disposable hosting, suggesting a phishing or scam attempt. The ClamAV detection further supports its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://wlao.on.ca/wp-content/plugins/super-forms/uploads/php/files/3c19942c8a6d5ebd0d62447d4ebda7be/10200468867.pdf
    • https://mp2020.csysadmin.com/ckfinder/userfiles/files/58437528546.pdf
    • https://peptidturkiye.com/ckfinder/userfiles/files/27830209203.pdf
    • http://tinhdauvietnam.vn/upload/files/zelekemivolatat.pdf
    • http://occahomesearch.com/userfiles/files/77111640104.pdf
    • http://misr-consult.com/userfiles/file/43900961336.pdf
    • https://www.reparaciondebomba.com.ar/wp-content/plugins/super-forms/uploads/php/files/pm040atic8hs9feroq3gclbb57/foruwuvapopimotej.pdf
    • http://kamkmori.cz/ckfinder/userfiles/files/papadovikasujozewuma.pdf
    • https://remoteyourstaff.com/calisma2/files/uploads/70684209009.pdf
    • https://transilvaniafishing.ro/app/webroot/files/userfiles/files/xavorafelodon.pdf
    • https://torrentclub.vip/wp-content/plugins/super-forms/uploads/php/files/k35hpa2jo46qi659hg8qs3nh1g/37420494732.pdf
    • https://fallsplat.se/bildbank/file/lubaja.pdf
    • http://zsdbiopharm.com/upload/files/33230558476.pdf
    • http://f-kcc.jp/user_data/userfiles/files/balidudutonaruratufeva.pdf
    • http://gorod-r.com/userfiles/file/pajujakolinedarobuwituzi.pdf
    • https://messianic.live/wp-content/plugins/super-forms/uploads/php/files/9e29186c2c31a8c46d17d5eb3986d577/nexitajagipawibasigexumo.pdf
    • https://www.dentaltaxpros.com/wp-content/plugins/super-forms/uploads/php/files/0abef3455980d7dcdfff8ac25d70536f/42698004981.pdf
    • https://alusol-kw.com/ckfinder/userfiles/files/kepulesutebuv.pdf
    • http://jamalcar.com/userfiles/file/64363606013.pdf
    • http://aguito.madteam.net/ckfinder/userfiles/files/27414253225.pdf
    • http://www.catalogodecineargentino.com/wp-content/plugins/formcraft/file-upload/server/content/files/161375d493f5f7---tozulezebide.pdf
    • http://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d156ea77bf---volodivodapev.pdf
    • https://bhavanarayanaswamy.org/userfiles/file/14777515388.pdf
    • https://svenjakretschmer.com/ckfinder/userfiles/files/watefutefaxobelobes.pdf
    • https://denimder.org/resimler/files/mawuwel.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=how+to+edit+video+in+android+phone
    • 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_off0000d72c.bin
142177597f21e8dc35a55faabd8df0b665549f36dd2621a5871097cfdb5bf252
pdf-font-stream PDF embedded font (sfnt) at offset 0xD72C 18348 bytes
font_01_sfnt_off00010708.bin
e96d53b8c45cc8708286f7e3bbd2252174d35f13276cdf82428189a232b9a0ff
pdf-font-stream PDF embedded font (sfnt) at offset 0x10708 10416 bytes
font_02_sfnt_off00011e8e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11E8E 16792 bytes