Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe6e781aa6b986e2…

MALICIOUS

PDF

85.5 KB Created: 2021-07-24 13:33:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 4fee821bd958a0f2e369f768ed5f8aa0 SHA-1: 7bbaaeca89b73f11dfead18f6ddc5f2fa6d1b60f SHA-256: fe6e781aa6b986e2780aa9f70cffc2c6c15d627d7877d941d295b96589f4b98f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The file contains numerous links pointing to compromised websites and disposable hosting, characteristic of a link farm used to distribute malicious content or conduct phishing attacks. No scripts were extracted, but the structure and URL patterns strongly suggest a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9905

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://cityfate.com/files/files/muwop.pdf In PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c65ba00d217---sidiju.pdfIn PDF document text
    • http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d9bc19017eb---pomomugar.pdfIn PDF document text
    • http://balassalaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/bodemalimonepenipolop.pdfIn PDF document text
    • https://sip7.pl/autoinstalator/sip7.online/wp-content/plugins/super-forms/uploads/php/files/95f79d0861ff01858f0b0b410e733386/85275905723.pdfIn PDF document text
    • https://bluebeakbranding.com/wp-content/plugins/super-forms/uploads/php/files/631b16637077c1fded9e46f8ff26405e/mimepefovaja.pdfIn PDF document text
    • http://kstarsmall.net/userfiles/file///70241980262.pdfIn PDF document text
    • http://hayatteknoloji.com/webimage/file/81877022706.pdfIn PDF document text
    • https://www.audifonosdoshoydos.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c96c77c24e5---naririzolilazeviba.pdfIn PDF document text
    • http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d025d2737d9---84971464703.pdfIn PDF document text
    • https://kvkumariajnkvv.org/singhania/downloads/file/80117289360.pdfIn PDF document text
    • https://childconcern.in/trila/userfiles/file/lewave.pdfIn PDF document text
    • http://evevoyance.fr/adh/.-/file/vutewewatedebuga.pdfIn PDF document text
    • https://purebodycare.courses/wp-content/plugins/super-forms/uploads/php/files/4k1mi48593b8shd4eijdjs5f8h/vibodotuvik.pdfIn PDF document text
    • http://childconnect.com/swi/fckfiles//file/11536117520.pdfIn PDF document text
    • https://kantankacreative.com/wp-content/plugins/super-forms/uploads/php/files/2891a1fe32f030a5e83d3a9b44866732/34253267729.pdfIn PDF document text
    • http://www.idenet.net/wp-content/plugins/formcraft/file-upload/server/content/files/160bfbc6aeed34---gabazefogomosaxiga.pdfIn PDF document text
    • http://maxgear.cz/webpagebuilder/ckfinder/userfiles/files/tezorilaxezupijofawupuse.pdfIn PDF document text
    • https://www.alongsideasia.com/wp-content/plugins/super-forms/uploads/php/files/7ecba53ff6bff5aac8d5713236f16c38/93580942309.pdfIn PDF document text
    • https://dentinale.eu/wp-content/plugins/super-forms/uploads/php/files/9805361fec34e50dde5280bc47c92d07/nipofexidenojener.pdfIn PDF document text
    • http://energo-winstal.pl/userfiles/file/fonukab.pdfIn PDF document text
    • https://remoteyourstaff.com/calisma2/files/uploads/dumizulibum.pdfIn PDF document text
    • http://www.pianoszimmermann.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16082812cbf06a---visumokabepusirefekel.pdfIn PDF document text
    • http://assushop.com/userfiles/assushop.com/file/kosiwodozazurojasa.pdfIn PDF document text
    • https://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a02d965bdd1---wilimumupigawobe.pdfIn PDF document text
    • https://binarbaidfabrication.com/public_html/userfiles/file/zibomorod.pdfIn PDF document text
    • https://fertilizergranulatorprice.com/d/files/75050359559.pdfIn PDF document text
    • http://kasintorn.com/images/upload/files/sadet.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=who+which+relative+pronouns+exercisesPDF 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_off0000e7d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7D5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ffe7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFE7 17876 bytes
SHA-256: 6e39d731e351e51e002c8567ad0af0220335c9b129790c4158546d9e03e08c0b
font_02_sfnt_off00012ea4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EA4 10816 bytes
SHA-256: 0e33876d5c5c4d5e530a6f7acf73b753e4d04c9bcfd9daa34e8534b6c1eda182