Malicious PDF — malware analysis report

Static analysis result for SHA-256 e48b94f5a6807cb4…

MALICIOUS

PDF

89.9 KB Created: 2021-07-27 08:48:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 3ab12be8dbd6bc40fcbe225ef4bc4a73 SHA-1: 230c4fae4fdd52546cf2f40acefe96f74fc5c1f8 SHA-256: e48b94f5a6807cb4be4155c1e3433632d10710470732fbd2d5ae3bb4d9e09467
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external links, many pointing to compromised WordPress sites, suggesting an attempt to redirect users to malicious content or phishing pages. The document body is heavily obfuscated and unreadable, providing no direct clues to its intent beyond the presence of embedded URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://reclaimsplus.com/wp-content/plugins/super-forms/uploads/php/files/7a30bf7e2b6eb752e0dbe39e61b35752/bajewomegete.pdf In PDF document text
    • http://xn--80aafkqcanfpgnhbng3b5i9a.xn--p1ai/pict/file/23468099783.pdfIn PDF document text
    • http://carolinaboatclub.com/userfiles/file/xejilemufasinegajoli.pdfIn PDF document text
    • http://www.iso-clean.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16080a6411cb71---rofiwepi.pdfIn PDF document text
    • http://fernandopelosini.it/userfiles/files/80809456901.pdfIn PDF document text
    • https://naoshima-habitant.com/zigerivum.pdfIn PDF document text
    • http://prodesign31.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c887530762c---36712555266.pdfIn PDF document text
    • https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160ee0457d2480---2035195961.pdfIn PDF document text
    • https://earthideasawnings.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f7405ef98a---wotomemugetuluvururuzu.pdfIn PDF document text
    • http://mai-colle.jp/userfiles/file/62824810674.pdfIn PDF document text
    • https://vdbergelectro.nl/wp-content/plugins/super-forms/uploads/php/files/31aa8b2c1798878dd8f427f94f0dd6e4/bakisanixarabixa.pdfIn PDF document text
    • https://www.assofmt.org/ckfinder/userfiles/files/73266549230.pdfIn PDF document text
    • https://bilalyapidekorasyon.com/userfiles/file/votivonarax.pdfIn PDF document text
    • http://shsuorui.com/uploadfiles/fckeditor/20210619/file/16241014802023.pdfIn PDF document text
    • http://www.highlandmetals.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160bf7cfb0c512---67070002086.pdfIn PDF document text
    • http://elliptical-trainers.ru/ckfinder/userfiles/files/nizog.pdfIn PDF document text
    • https://grupo-bahia-real-estate.com/ckfinder/userfiles/files/lukaxesavilezusivu.pdfIn PDF document text
    • https://tlpnw.com/wp-content/plugins/super-forms/uploads/php/files/f11a24ad9f395bf4f41efc2fda7cf567/dumefuxexovesi.pdfIn PDF document text
    • http://interwork.sk/userfiles/file/xegobulikedijeto.pdfIn PDF document text
    • https://hps-gruppe.com/wp-content/plugins/super-forms/uploads/php/files/me5qvukbfku92doooctsdo3ghp/94875825837.pdfIn PDF document text
    • http://webbuilders.com/files/file/86028185417.pdfIn PDF document text
    • http://hagelkonzept.de/userfiles/file/mabaruzop.pdfIn PDF document text
    • https://viticoltura-enologia.com/file/84954291031.pdfIn PDF document text
    • http://tachikawa-derma.biz/ckfinder/userfiles/files/65774407744.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=buddhism+plain+and+simple+summaryPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fdbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDBC 17232 bytes
SHA-256: 4543169434a2a33f4a502504a99576a5b0365617b4367fe8b0855b27ba44d7b4
font_01_sfnt_off00012a6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A6E 10708 bytes
SHA-256: c4082d05ac9775ef403f742498fe7b2f5702eccf42af89c8f2959f318d5b92db
font_02_sfnt_off000142cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x142CF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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