Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c80f24d221418e9…

MALICIOUS

PDF

104.5 KB Created: 2021-07-31 12:28:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 48b05df080e3c0bafa646c76d145a10d SHA-1: f7aadc382cd8ed2b22ab830d3394d27b5f9c95d8 SHA-256: 1c80f24d221418e9b910d24072a0609650efc8dd4ed94111da324a1bef2cdc81
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised or disposable hosting. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a deliberate attempt to create a large number of links, likely to distribute malicious content or conduct phishing. The ML classifier and ClamAV detection strongly suggest malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9867

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://pixomot.ru/uplcv?utm_term=disable+dual+mode+brocade PDF link annotation
    • http://navigator-nsk.ru/userfiles/file/16300848552.pdfIn PDF document text
    • https://grandplaza.bg/uploads/assets/file/lilidoxinuka.pdfIn PDF document text
    • http://hoinhikhoavn.com/img/files/vixewixinogunukemotinug.pdfIn PDF document text
    • https://veglifekc.org/wp-content/plugins/super-forms/uploads/php/files//45191666907.pdfIn PDF document text
    • http://ophirtonhotel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16083dff4cb6e0---10960235331.pdfIn PDF document text
    • http://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/16090ca366bcca---xiket.pdfIn PDF document text
    • https://aldapa.eus/files/galeria/files/dinogakutuzedofilajelup.pdfIn PDF document text
    • http://holidayservicemarsala.it/userfiles/files/goripes.pdfIn PDF document text
    • http://picassogift.com/Uploadfiles/files/jasadaginorizifijokurur.pdfIn PDF document text
    • https://inchiriereelicoptere.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608df9e0ed588---wuwagawanubapegonamuji.pdfIn PDF document text
    • http://americanpetrochemicals.com/customers/CMS-IMAGES/file/noveviratefim.pdfIn PDF document text
    • https://pharma-tools.eu/galeria/file/wowaraxogusomo.pdfIn PDF document text
    • http://canadapremiumlubes.com/survey/userfiles/files/fixuvemolivexedigim.pdfIn PDF document text
    • https://ipcare.nl/wp-content/plugins/super-forms/uploads/php/files/kim9f02km8tbjpejt94mlcjs3u/84898627847.pdfIn PDF document text
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e816c2d801---fulowalokedoruxonojano.pdfIn PDF document text
    • http://penoplex24.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1606d1859a288c---satodefonobevob.pdfIn PDF document text
    • http://skuplaptop.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1609cfeafa049e---gipadozakoraza.pdfIn PDF document text
    • https://a5productions.com/home/a5pro/public_html/ckfinder/userfiles/files/daxokozozupeluxi.pdfIn PDF document text
    • https://snpwachq.com/files/js/ckfinder/userfiles/files/ripisom.pdfIn PDF document text
    • https://aguiapromocional.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609c143e0c5a1---57667500834.pdfIn PDF document text
    • https://majorsagilekvaros.hu/uploads/file/20916926997.pdfIn PDF document text
    • https://soudurelauziere.com/upload/editor/file/58830533537.pdfIn PDF document text
    • http://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c7507b6df75---30495126.pdfIn PDF document text
    • https://renfrewareahealthvillage.ca/ckfinder/userfiles/files/32785946803.pdfIn PDF document text
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/160743a2d0146c---88677415793.pdfIn PDF document text
    • http://tavernadelsnoguers.com/wp-content/plugins/super-forms/uploads/php/files/86c98aa15178209de6a0ee6724624f52/23821763489.pdfIn PDF document text
    • https://www.mnspineandsport.com/wp-content/plugins/super-forms/uploads/php/files/c9c0191fccd168cc31654d8f1dd1ea59/94912204628.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013384.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13384 10568 bytes
SHA-256: 8072262b445c6300127671d6dd6b4f29c504e8a22782a41cfe41fb48a2cabbbb
font_01_sfnt_off00014b99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14B99 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000163ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x163AB 18308 bytes
SHA-256: 70192cd909d35ebad5c21a7cd995aa3f14c3160b3225c5cb725fa6418642a1f1