Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b7094a7d7bf85c6…

MALICIOUS

PDF

86.8 KB Created: 2021-07-03 19:53:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: e159c7dc0c84b720a2995a5b89592329 SHA-1: f00fb53b1f28ddbbf62a52a2b1b286cbd5293c2e SHA-256: 5b7094a7d7bf85c691c740118e5ee2d74119a9aafe81bd55f1fc30aee75828a8
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous embedded URLs pointing to websites hosted on compromised CMS upload storage. These links are likely used to lure users to phishing sites or download further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/160affa83e9254---98930128553.pdf In PDF document text
    • https://lacecinella.com/writable/public/userfiles/file/80423650924.pdfIn PDF document text
    • https://ka-base.no/images_content/file/54540971652.pdfIn PDF document text
    • https://awlights.com/wp-content/plugins/super-forms/uploads/php/files/28b81ee081f8bfde1cf50216d9e4900b/wufajimekobifirubepilo.pdfIn PDF document text
    • https://member-amz-seller-system.de/wp-content/plugins/super-forms/uploads/php/files/ccd82c6ba3f45d47aa5a063e34343234/wimenafejuvilu.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160727a930aaff.pdfIn PDF document text
    • https://freedomtampons.com/wp-content/plugins/super-forms/uploads/php/files/4d4513754ea1ff78091b6e28507673c6/96985188323.pdfIn PDF document text
    • https://otdelkamos.ru/wp-content/plugins/super-forms/uploads/php/files/56f5b7aeaf0cb40ddc98a0e7b1f18f83/gowor.pdfIn PDF document text
    • https://www.jscorporation.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/1609293edee443---vatomudafikavoka.pdfIn PDF document text
    • http://lirealestatelitigator.com/wp-content/plugins/super-forms/uploads/php/files/0ae3997a783ddaca1ee987f4afdd3622/sonuxeterojawu.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/16079f7b498f32---dimigafawokazifenebazip.pdfIn PDF document text
    • http://www.communityheroesproject.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607b3b2237dc2---14395259108.pdfIn PDF document text
    • http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6d4b9d28c3---zubikobigofasivodon.pdfIn PDF document text
    • https://www.beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/951437a4681e5332476ed1246480bcb7/vewepinub.pdfIn PDF document text
    • https://codecs.ro/images/file/nefunepolojif.pdfIn PDF document text
    • https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16071e16012290---gisujidobelorexi.pdfIn PDF document text
    • https://m3csrl.com/file/gefowodaz.pdfIn PDF document text
    • http://ilyxrace.com/userfiles/files/jumukulirejibaxipesoku.pdfIn PDF document text
    • https://www.rydalmereprestige.com.au/wp-content/plugins/super-forms/uploads/php/files/q47i1auotqn23l4c2bobg33p9j/daxepinu.pdfIn PDF document text
    • http://bhhangkhong.com/upload/images/files/kusisu.pdfIn PDF document text
    • https://soosekszer.hu/upload/files/rafelapevolagawedudoku.pdfIn PDF document text
    • https://www.andimoda.com/wp-content/plugins/super-forms/uploads/php/files/5ff7bc1c1021a4aa6429f2a49ffd5760/50713234934.pdfIn PDF document text
    • http://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160873d6f59ea0---98324939192.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=can+you+reheat+mashed+potatoes+in+the+ovenPDF 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_off0000f020.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF020 17044 bytes
SHA-256: bbfbbd13408ee38e177e431e4a3fd84863654e4f3503f1f6adfa8bd2fc9dfc23
font_01_sfnt_off00011c75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C75 10924 bytes
SHA-256: 5c2cb503ed2f26a71f6f55d0648c0d1aa7032c7d101848f74c98cd2535b26166
font_02_sfnt_off000135a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x135A7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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