Malicious PDF — malware analysis report

Static analysis result for SHA-256 8698d09ba0561842…

MALICIOUS

PDF

89.6 KB Created: 2021-07-13 18:08:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: fc5b283355bd1dab92f89d8ac3bae14c SHA-1: 4453ac89ba75e5c95480f8d3b912479bcd297c0a SHA-256: 8698d09ba0561842a218fad37bdbacd4de55dce22e6fac5504606c144f4240a0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document functions as a link farm, hosting numerous PDFs on compromised WordPress sites, which is a common tactic for phishing or distributing further malware. The presence of multiple distinct hosts and a large number of links suggests a coordinated effort to spread malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://www.wallisandemmanuel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cbe7ebf15b2---medirulexoxepuxo.pdf In PDF document text
    • https://www.makathastaliklari.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607e8f46c2774---22498805659.pdfIn PDF document text
    • https://www.mozartcantat.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160ded38846c91---34558739900.pdfIn PDF document text
    • https://www.dekleinewerf.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608539eb29218---zozeluguwudu.pdfIn PDF document text
    • https://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/eac2fd8590908ba57dfd4639f84f6aaa/82989880584.pdfIn PDF document text
    • http://www.kickcommerce.com/userfiles/file/83118804075.pdfIn PDF document text
    • http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607c1eb9ab6d8---xewobeveloxajirodizafixej.pdfIn PDF document text
    • https://web-sila.ru/wp-content/plugins/super-forms/uploads/php/files/a5041fe3d51d73e4e46df0e283eeb3b9/gaguzopanaxikanagemon.pdfIn PDF document text
    • http://www.a-fairys-choice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6c477e87a6---44558870721.pdfIn PDF document text
    • http://schouteninterieurwerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b9e192aea7e---tipakekuragenerepos.pdfIn PDF document text
    • https://rivaflo-south.in/userfiles/files/zejisedeleb.pdfIn PDF document text
    • http://kleinschaden.expert/userfiles/file/54827199614.pdfIn PDF document text
    • https://cvenhancer.com/wp-content/plugins/super-forms/uploads/php/files/e15fa9528120983fd1852db013b0d333/dikilej.pdfIn PDF document text
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092f7ff5d9e8---320705794.pdfIn PDF document text
    • http://minhtoangalaxyhotel.vn/app/webroot/files/ckfinder/files/duxotiwefarijik.pdfIn PDF document text
    • https://artbynela.com/uploads/file/4223194254.pdfIn PDF document text
    • http://moestuinwebshop.nl/userfiles/file/91046437878.pdfIn PDF document text
    • https://www.wikiwebagency.it/wp-content/plugins/super-forms/uploads/php/files/bbe48da6310119b8c21e9d030ad355ae/komaxiteragosili.pdfIn PDF document text
    • https://garyjetcenter.com/wp-content/plugins/super-forms/uploads/php/files/c02188109a55922aa203345cb93ea8e2/68278188175.pdfIn PDF document text
    • http://www.ausafrica.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a2cca0a2dc4---8003577403.pdfIn PDF document text
    • https://mygamedaysports.com/wp-content/plugins/super-forms/uploads/php/files/46ef8c3c6d092f53e52a838fd06ec590/vanunodosotosa.pdfIn PDF document text
    • http://lilit-realty.com/wp-content/plugins/super-forms/uploads/php/files/29608phq4sgn9p08fuogi6fhg4/85085934234.pdfIn PDF document text
    • https://vico-domrep.com/ckfinder/userfiles/files/47465245076.pdfIn PDF document text
    • http://gospel-pour-100-voix.com/fichiers/newsletter/file/32929123530.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=how+to+make+obsidian+portal+in+minecraftPDF 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_off0000fbb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBB8 16756 bytes
SHA-256: 28470d2a897e3a4cbc9315f719bfabcc351bfead9e7ee5fbbe75b25dad3edee3
font_01_sfnt_off0001273a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1273A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013f51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F51 11092 bytes
SHA-256: 94eabd2c5484469672a741880ddcef8e539624d72ba892b93b22f313ac230b49

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