Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ed007036c200141…

MALICIOUS

PDF

76.9 KB Created: 2021-06-26 21:26:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 15551f4cbc7eca1fe8a050a36fa3fb8f SHA-1: 0c7fd65f33f559a611e047d6ac6e8077e0abd9e2 SHA-256: 7ed007036c2001410cecc82be7825746969dd043c297438100dbeb61a93ff8ef
164 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple compromised CMS upload storage locations. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the link farm suggest an attempt to redirect users to malicious content or further download stages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://chinoboxingclub.com/clients/36032/File/28201475922.pdf
    • https://www.marvistasales.com/wp-content/plugins/super-forms/uploads/php/files/52e626a85c5ca0e7654cb01984e07f52/rizokagumatibupazopope.pdf
    • https://monacollection.ua/wp-content/plugins/super-forms/uploads/php/files/e500f79e5d5b8b758be0fb2579deaf2c/91683635701.pdf
    • http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/160741c1f2ead8---62953058565.pdf
    • https://www.rowtheerne.com/wp-content/plugins/super-forms/uploads/php/files/235caf852628c5ef9299e3264303bd5d/446022805.pdf
    • https://dutchfansitenetwork.nl/ckfinder/userfiles/files/68407342348.pdf
    • http://sieckultury.pl/wp-content/plugins/super-forms/uploads/php/files/c7be60a44f5c471b65927136c8e1b8c6/20620622385.pdf
    • https://textolinguisticsolutions.com/upload/editor/file/87292280129.pdf
    • http://e-hematologica.com/users//file/42860851273.pdf
    • https://mikepromedia.com/wp-content/plugins/super-forms/uploads/php/files/7tei7d7cf3os21vm039ncnn6g6/92518801021.pdf
    • https://www.charityweiss.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606caf2e1417a---pujag.pdf
    • http://automsystem.com/UploadFile/file/20210503145919088.pdf
    • http://maility.pl_adresuserfiles/file/56734154755.pdf
    • http://hillcresthigh1971.com/clients/9/9f/9fbf9047a6869172a982db6f42f05a9a/File/teraxanawe.pdf
    • https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/160912d6432a7b---vikevu.pdf
    • https://www.movingwithmagna.com/wp-content/plugins/super-forms/uploads/php/files/b92a647d501b4e4a8f35e40cde5202ee/22174302437.pdf
    • https://webupdate.ca/wp-content/plugins/super-forms/uploads/php/files/777a67hnuea5hk0adn3lhluea9/82786975210.pdf
    • http://campbellelectronics.com/uploads/toxifowisokemununamokoli.pdf
    • http://gymostrov.org/gymostrov/userfiles/file/niwoxatemezolopun.pdf
    • https://stefandes.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082357ed4fa4---jobuvowozeresolerir.pdf
    • https://alsterparkett.de/wp-content/plugins/super-forms/uploads/php/files/qt22k0laoogsasr37lo7f246pn/27973375619.pdf
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607aef1caf77b---rutalegalakizedafepowo.pdf
    • http://sarahscupcakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608331a19d464---motosuret.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=22+lr+subsonic
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cab0.bin
f5f238fda18427216a6dddda8c5aa49fdd3c8f2cdb3b3ae9f86b76e462d70db3
pdf-font-stream PDF embedded font (sfnt) at offset 0xCAB0 16860 bytes
font_01_sfnt_off0000f6ac.bin
8255e04a67438c7037ce7c1de31d2b902f31018dbaa2f068464450e7c5de46a9
pdf-font-stream PDF embedded font (sfnt) at offset 0xF6AC 10096 bytes
font_02_sfnt_off00010d41.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10D41 16792 bytes