Malicious PDF — malware analysis report

Static analysis result for SHA-256 aeda2a77d02e70f6…

MALICIOUS

PDF

72.2 KB Created: 2021-05-27 18:06:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 33f30262896c119de89a916cb585d981 SHA-1: 7e4ad6c68ca809ab8a6249be9f53335c254ad046 SHA-256: aeda2a77d02e70f643f2b059ea7c05e6d4bd8e7bf9a306221c823e6e329ac579
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or appear to be part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The embedded URLs and the nature of the heuristics suggest the document is designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 https://mrmusicfoundation.org/wp-content/plugins/super-forms/uploads/php/files/f5jpef1gd68mj2g7vi2n1022og/52317489519.pdf In PDF document text
    • http://www.northeastmarquees.com/wp-content/plugins/super-forms/uploads/php/files/6a6e9a3b22a2a7e2c0e8d423b738308e/43919016652.pdfIn PDF document text
    • http://c2mag.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a3a8b5dc6b---gumefizo.pdfIn PDF document text
    • http://artospace.com/pics/file/juxanujatokalizatukogus.pdfIn PDF document text
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/160825e3e7fc6a---81437760834.pdfIn PDF document text
    • http://skup-laptopow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085c7bc67adb---46077811432.pdfIn PDF document text
    • https://nevisnews.com/userfiles/30734746724.pdfIn PDF document text
    • https://www.adcgrain.com/wp-content/plugins/super-forms/uploads/php/files/be51c44dded814b3b44d3a64883c74e7/tijunejalareminoda.pdfIn PDF document text
    • https://www.foundationofhope.org/wp-content/plugins/formcraft/file-upload/server/content/files/16082e5f1d3041---tidakuwoxubuxejodof.pdfIn PDF document text
    • https://voicelux.ru/wp-content/plugins/super-forms/uploads/php/files/fb1961ba2158d813aaffdec2bde6ee83/52503639870.pdfIn PDF document text
    • https://bharatbiodiesel.com/userfiles/file/kazudaf.pdfIn PDF document text
    • https://fietenhaardenenkachels.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609aa7bd7fe4b---8064060637.pdfIn PDF document text
    • https://thehamptonsbloomington.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ebfb532a6a---82851719948.pdfIn PDF document text
    • http://witnesstherealist.com/wp-content/plugins/super-forms/uploads/php/files/c41c5b24b14bd1bb30f025ede1dc1883/87936928607.pdfIn PDF document text
    • http://zonazero.es/userfiles/file/rilulud.pdfIn PDF document text
    • https://stillwaiting.org/userfiles/file/69800704097.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160abf8883830c---87975873803.pdfIn PDF document text
    • http://alpanelektrik.com/depo/sayfaresim/file/kulige.pdfIn PDF document text
    • http://altaprecision.com/userfiles/file/wojalosufurapifomu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=calcula+el+numero+de+protones+neutrones+y+electrones+del+carbonoPDF 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000da20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA20 5364 bytes
SHA-256: 8ff804eeebab17fa53d0974645e297851baef1cd4820d4211a0ca19aaf3c5a21
font_01_sfnt_off0000ec42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC42 11252 bytes
SHA-256: f8d0723122f16b73ed6f16c7f9d1a6bd956ff80e5bbea8e6446c080825767d08

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