Malicious PDF — malware analysis report

Static analysis result for SHA-256 4244bed3ff1ac11d…

MALICIOUS

PDF

94.0 KB Created: 2021-07-22 19:28:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 670a916e606b61e8fecc2eb1851b76e1 SHA-1: a1237ba0532bb7d089fe0e59cd1e3f4bba3aa5ab SHA-256: 4244bed3ff1ac11d1dac11fb69adf8890c758e657f0a25f15461269ff6d1f447
156 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of multiple external URIs and a link farm heuristic strongly indicates an attempt to lead users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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://z500.si/files/livazuxagetutus.pdf In PDF document text
    • https://too.kg/wp-content/plugins/super-forms/uploads/php/files/73692c879ffb4f914f4316d2fe1747d4/6423910870.pdfIn PDF document text
    • https://sellos-mecanicos.com/wp-content/plugins/super-forms/uploads/php/files/1cdb5abc678a003d35fe1acfa5d67056/13477186804.pdfIn PDF document text
    • http://chiesamadremarsala.eu/userfiles/files/1355553909.pdfIn PDF document text
    • https://fatheragneliti.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089a3aa2bb95---63398063251.pdfIn PDF document text
    • http://esipro.fr/userfiles/file/xemaguxuxuzufanolidepav.pdfIn PDF document text
    • http://africanhairbraidingsalon.com/userfiles/file/nelexi.pdfIn PDF document text
    • https://ivanamihic.com//files/dowapepadesefitimerar.pdfIn PDF document text
    • http://noithatlekhanh.com/Images_upload/files/49785913835.pdfIn PDF document text
    • https://readxyz.com/wp-content/plugins/super-forms/uploads/php/files/8f98d6e7e44dfec2f80a10064724e26d/fuwexujomikokon.pdfIn PDF document text
    • https://www.frankreich-ferien.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1607c1100d0d78---98258192944.pdfIn PDF document text
    • http://bergfin.se/wp-content/plugins/formcraft/file-upload/server/content/files/160ba3cddd5494---megusig.pdfIn PDF document text
    • https://thai-airpark.com/ckfinder/userfiles/files/13488669389.pdfIn PDF document text
    • https://airflow-skateboards.com/upload/file/saxarodexele.pdfIn PDF document text
    • http://cocoal.com/uploads/file/20784881967.pdfIn PDF document text
    • https://menu2uplus.com/images/file/77369220589.pdfIn PDF document text
    • https://www.areatransfers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a89feccfd25---lunuputiwixizeluzijut.pdfIn PDF document text
    • https://serka.com/serka/upload/files/80421030144.pdfIn PDF document text
    • https://hkparkkonutlari.com/image/files/22394344878.pdfIn PDF document text
    • http://www.everhouse.lt/wp-content/plugins/formcraft/file-upload/server/content/files/160c271fa41af5---39602572402.pdfIn PDF document text
    • https://www.ogblfrontaliers.fr/wp-content/plugins/super-forms/uploads/php/files/abdbbed6dma3jd7oj6t21iktkv/71897736197.pdfIn PDF document text
    • http://www.orarestauratorisaf.it/wp-content/plugins/formcraft/file-upload/server/content/files/160ca6249aac2c---rugowimevanav.pdfIn PDF document text
    • https://thedestinbeachhouses.com/wp-content/plugins/super-forms/uploads/php/files/6b31744860102c30077cd204ab82de07/62643931510.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=avengers+age+of+ultron+movie+watch+onlinePDF 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_off00010b01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B01 17504 bytes
SHA-256: e1bf88edc76bc33f0834dbd0cd3373fbd53a7fdb86cc2fd064ab499965904df3
font_01_sfnt_off000138a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x138A9 11016 bytes
SHA-256: d06327fdd41cb849ea17a3419252fc7f862beb8678677b4587712d537e2c8f41
font_02_sfnt_off00015238.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15238 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.