Malicious PDF — malware analysis report

Static analysis result for SHA-256 98515ac95638b205…

MALICIOUS

PDF

84.9 KB Created: 2021-09-20 09:23:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: d0eb2f338920ee7ead9b78e56470770f SHA-1: 6bf9ae5430967b408ce58a82dd61e1079065aeaa SHA-256: 98515ac95638b20581b0ae25a2a47e595e2e3a984b9fdf54f151803b4749ae0e
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is often used to exploit vulnerabilities or redirect users to malicious sites. The presence of a link farm on disposable hosting, along with multiple links pointing to compromised CMS uploads, strongly suggests a phishing or malware distribution attempt. ClamAV detection as 'Pdf.Phishing.Trojan' further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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://g4m3s-4p1-12s1.com/contents/files/90701525985.pdf In PDF document text
    • http://bidwoodmachine.com/d/files/gobogevev.pdfIn PDF document text
    • http://joshuadacosta.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613521d256aed---77214127289.pdfIn PDF document text
    • http://whygzy.com/Media/Uploads/files/dexanumajisuzefufupu.pdfIn PDF document text
    • http://yurisolomko.com/userfiles/file/86381971721.pdfIn PDF document text
    • http://mobilahomedesign.com/userfiles/files/gaguxegowo.pdfIn PDF document text
    • https://greenturtleproductions.com.au/wp-content/plugins/super-forms/uploads/php/files/0d660d11a88a3721aa136b60d9ddadd0/wezudavawigufoxenet.pdfIn PDF document text
    • http://siddharpeedam.org/userfiles/file/In PDF document text
    • http://dspec-car.com/js/upload/files/64140199703.pdfIn PDF document text
    • http://xn--82cac8d3ajrc0gd0bo4a7nf3qg.com/userfiles/files/buzolojiposiwesu.pdfIn PDF document text
    • https://www.hdontheroadnapoli.it/wp-content/plugins/formcraft/file-upload/server/content/files/1613e394a237a7---kabirewebufubuvivel.pdfIn PDF document text
    • https://siyata.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/161378d38d71aa---62367858818.pdfIn PDF document text
    • http://rklatex.com/userfiles/file/gexerudukelolopimag.pdfIn PDF document text
    • https://noventa.cz/media/files/file/wejufawikusisiri.pdfIn PDF document text
    • https://castel.ro/userfiles/file/tiganenokoruxolaviti.pdfIn PDF document text
    • http://herodumpsterrental.com/wp-content/plugins/super-forms/uploads/php/files/cde38984218e1d8950e5da33eca36ac3/45814953245.pdfIn PDF document text
    • https://www.ediliziaindustriale.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614352e0c9062---52888336734.pdfIn PDF document text
    • http://dongsimkindergarten.com/upload/files/puxodoxupadi.pdfIn PDF document text
    • http://belovosushi.ru/files/xavemajop.pdfIn PDF document text
    • http://brlairport.com/images/file/laborujudebibeporidasuko.pdfIn PDF document text
    • http://www.ciesol.es/ckfinder/userfiles/files/1245570236.pdfIn PDF document text
    • http://z-sinpro.com/upload/files/37793207932.pdfIn PDF document text
    • http://davcpundri.com/css/file/62882595730.pdfIn PDF document text
    • https://fulzugaskozpont.hu/files/58546206533.pdfIn PDF document text
    • http://associatedreclaimed.com/userfiles/files/jofiworez.pdfIn PDF document text
    • http://uni-farm.pl/ckfinder/userfiles/files/fujekakamimamedegaguxoj.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=can+i+use+my+phone+as+a+controller+for+ps4PDF 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_off0000e098.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE098 19516 bytes
SHA-256: 4d81e1c470eecc298534aa686203677a0bc853ab3e2e3d2be68f620d627d12ec
font_01_sfnt_off000113a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113A6 11068 bytes
SHA-256: 15ae62a15c3647c90ed7388c360ec225180cc0a77c5d85599d25e79fd3de69d0
font_02_sfnt_off00012d55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D55 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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