Malicious PDF — malware analysis report

Static analysis result for SHA-256 aad75364f424f4c7…

MALICIOUS

PDF

76.7 KB Created: 2021-09-09 06:51:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 89b7da6590a022f4fdccc65978a26ce4 SHA-1: 9cb6fd70ffc173826d9509c9bd0ee41c88a80043 SHA-256: aad75364f424f4c752408675567cbe4b76915503dd0933494f151371656a01b7
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for Pdf.Phishing.Trojan. The presence of numerous links pointing to compromised WordPress upload storage and disposable hosting suggests a link farm designed to redirect users to malicious content. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://la-roofers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16134886189e50---palunutofupuxagevokik.pdf In PDF document text
    • https://sushixusa.com/userfiles/files/94922246433.pdfIn PDF document text
    • http://noospc.ru/SITE/files/editor/file/xijovatetusuwojawed.pdfIn PDF document text
    • http://bukharaalpharetta.com/sites/default/files/file/30071264755.pdfIn PDF document text
    • http://portableandcool.com/files/files/53297149333.pdfIn PDF document text
    • https://wolfgang-photography.com/userfiles/files/jofaja.pdfIn PDF document text
    • https://westcoastmovers.ca/wp-content/plugins/super-forms/uploads/php/files/qim0d3ju4jsbjqqmldt7bqtma1/dojudigu.pdfIn PDF document text
    • http://hit-air.pro/ckfinder/userfiles/files/jotifurorabikawosuxut.pdfIn PDF document text
    • http://www.patricktennis.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1612fcdf5607f4---wituxepesuwenepemerimep.pdfIn PDF document text
    • https://campfun.myhost888.com/upload/ckeditor/files/36406746448.pdfIn PDF document text
    • http://35ct1.com/images/ckImageFiles/files/42488167238.pdfIn PDF document text
    • http://rapet.hu/files/63654654875.pdfIn PDF document text
    • http://victorylimo1.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132f59dd9591---ziroriderogisumazo.pdfIn PDF document text
    • http://toyotacri.com/userfiles/files/99966964138.pdfIn PDF document text
    • http://bephoangdung.vn/uploads/ckfinder/files/xeguxavoxavadoruwubek.pdfIn PDF document text
    • https://jnnjhansi.com/userfiles/file/74306415671.pdfIn PDF document text
    • http://spiregene.com/image/files/20210905_011549.pdfIn PDF document text
    • https://gopherscopes.com/userfiles/file/vagudezalilupekososina.pdfIn PDF document text
    • https://baconbites.com/wp-content/plugins/super-forms/uploads/php/files/8477br7nk38es7jgia04o29lt6/10596369880.pdfIn PDF document text
    • http://bippex.com/filespath/files/20210902060441.pdfIn PDF document text
    • https://www.avenueroadadvertising.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137cfee9e1e9---gipedimofosumo.pdfIn PDF document text
    • https://abhrian.com/userfiles/files/90743294045.pdfIn PDF document text
    • http://tcsklife.com/filespath/files/20210905085148.pdfIn PDF document text
    • http://upsshop.ru/ckfinder/userfiles/files/76762584901.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=catch+22+joseph+heller+pdfPDF 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_off0000c804.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC804 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e01b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE01B 10800 bytes
SHA-256: 163417e30a7e6ec2a18e092fb47b935a704daa48a2d602222f907c7e02f1c2a3
font_02_sfnt_off0000f948.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF948 16996 bytes
SHA-256: 64a9ff1907e02dac8618dac7d3f63714ef4413d89941886b742176226e390c74