Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa43fb6176af3ff6…

MALICIOUS

PDF

91.7 KB Created: 2021-09-06 22:51:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: cab5d94c04f5ffb6bb4e1391a1c21c4d SHA-1: ec36d947d6ca8b3055117d10ff295eb2af3429c1 SHA-256: fa43fb6176af3ff66e504433ed2de7570e6811e311ad8de72471ae3554bd2f52
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URLs, many hosted on compromised WordPress sites or disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery. The presence of embedded JavaScript points to potential exploitation or further payload execution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9959

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://garglob.ru/uplcv?utm_term=epic+of+gilgamesh+translation+andrew+george+pdf PDF link annotation
    • http://nutrisoilvietnam.com/upload/files/45671248769.pdfIn PDF document text
    • https://bangvetthuong.com/luutru/files/bofekatizidova.pdfIn PDF document text
    • http://flomojapan.com/upload/files/25772950646.pdfIn PDF document text
    • http://southportrubbish.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608227b33ca40---99729033215.pdfIn PDF document text
    • http://ameshamagazine.com/js/upload/files/xeretobugut.pdfIn PDF document text
    • http://stoewebdesign.no/userfiles/file/93739810845.pdfIn PDF document text
    • https://sgdivorcelawyers.com/wp-content/plugins/super-forms/uploads/php/files/c9adb32de46219471a14d8dd3dc010bc/47018496212.pdfIn PDF document text
    • https://forex-robo.org/wp-content/plugins/super-forms/uploads/php/files/5203c53c2b02618576636bfb1815598f/59684903827.pdfIn PDF document text
    • https://backcountryplayground.com/wp-content/plugins/super-forms/uploads/php/files/0dce60cc9d6cfa2b9480d39d5d88e932/53201213764.pdfIn PDF document text
    • http://birzebbugastpetersfc.com/files/file/zazumepaburonag.pdfIn PDF document text
    • http://ksklinika.ru/ckfinder/userfiles/files/61128684703.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/a9861udhaquqd1uhf280g0j7d9/30246662422.pdfIn PDF document text
    • http://es-umzuege-transporte.de/wp-content/plugins/super-forms/uploads/php/files/00670363594644b3788e8516bde4d7b1/69058180682.pdfIn PDF document text
    • http://www.peplex.it/wp-content/plugins/formcraft/file-upload/server/content/files/16094aec790019---xepod.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/e0383cba6e0b0cccd6312b21811b0478/zobatukulesamu.pdfIn PDF document text
    • https://www.rowtheerne.com/wp-content/plugins/super-forms/uploads/php/files/93fd8e1f10ffc939021ff390ef152e95/26802354935.pdfIn PDF document text
    • http://roycraft.ca/userfiles/file/54400730861.pdfIn PDF document text
    • http://actionelectric.pt/www/wp-content/plugins/formcraft/file-upload/server/content/files/16134865666a52---46874817446.pdfIn PDF document text
    • http://freetourscadiz.com//ckfinder/userfiles/files/rogalejikasifij.pdfIn PDF document text
    • http://maidnheaven.com/wp-content/plugins/formcraft/file-upload/server/content/files/160910dbe5c6d5---2156889043.pdfIn PDF document text
    • https://studio45.live/wp-content/plugins/super-forms/uploads/php/files/9etceasvmsd9p7ngohe7o7gc3i/74854036190.pdfIn PDF document text
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dcc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCC4 18204 bytes
SHA-256: a00a0c294c77b37aab9827e91e2f7034072264a8db8cf21e2a38c406d271c066
font_01_sfnt_off0000f943.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF943 19572 bytes
SHA-256: 22fc9a36759fea8d0a88456d936fd75fcc5791547ad1031f36e2dd2be4eb1b4c
font_02_sfnt_off00012ca7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CA7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off000144be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x144BE 11136 bytes
SHA-256: d38aa6b077dfc5ef8384f49d5e76357c365f37e99367ff693119204e81664f1d

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