Malicious PDF — malware analysis report

Static analysis result for SHA-256 19948f9672887eef…

MALICIOUS

PDF

86.8 KB Created: 2021-08-12 16:59:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6b967ec08452cf632a3193175bf824f2 SHA-1: 1efee1e423612f433fb121fb9c6414434545fcec SHA-256: 19948f9672887eef80ff6e0cc45005a6d19c60c6beab2c40a2c81cbbc61e84e6
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous URLs pointing to various websites, including those hosted on compromised CMS platforms. The presence of these links suggests an attempt to lure users to potentially malicious sites for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://worshipedia.net/sites/default/files/file/dexizujarajiduvenenigez.pdf
    • http://atrsara.ir/resource/files/86375905746.pdf
    • http://raunlarose.us/wp-content/plugins/formcraft/file-upload/server/content/files/16085815b1d3c9---goramowe.pdf
    • https://hoatuoi360.vn/uploads/files/musuxagimuzupiwogag.pdf
    • http://ausafe.net/images/art/files/pefexaruxaxifefagujilu.pdf
    • http://www.cargeacrew.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607787e16e7ce---60488829321.pdf
    • https://www.hintonassociates.com/wp-content/plugins/super-forms/uploads/php/files/96fbd51c9b2a47722b74809e18e5946d/munigugevagu.pdf
    • https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1608e7b2bd51ee---bubujufizotizopadojor.pdf
    • http://theclubburger.com/uploads/files/livabiwawekujipi.pdf
    • http://wrtour.com/FileData/ckfinder/files/20210716_CBCB3224D94D24FF.pdf
    • http://sochisushi.nl/survey/userfiles/files/44354469072.pdf
    • https://sitpchemcieszyn.pl/_sitpchem/file/70502491050.pdf
    • https://member-amz-seller-system.de/wp-content/plugins/super-forms/uploads/php/files/b6309027650a195b55767123c1049b0c/62941416760.pdf
    • http://stavclearing.ru/upload/files/76444835083.pdf
    • http://bsl-trans.ru/admin/ckfinder/userfiles/files/80258787437.pdf
    • https://stvorki.ru/files/file/81926347847.pdf
    • https://dnmpaint.com/sdcc/images/file/kasakidot.pdf
    • https://yidinfo.net/wp-content/plugins/super-forms/uploads/php/files/58gh5fgh1upvsdkvikb68nepj4/28362304414.pdf
    • http://www.nbrownies.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c397249115a---jixizenajo.pdf
    • http://sattamatkapatti.com/userfiles/file/26119385662.pdf
    • http://big-blue-bus.com/pics/fotos/1/file/jurotanesegejosewugifoz.pdf
    • http://itaindustrial.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a7e492b0259---bipugivisuv.pdf
    • http://schokoladenfontaene.de/idata/82717926151.pdf
    • https://nuevocoach.co.uk/wp-content/plugins/super-forms/uploads/php/files/0b9ac8a91f93e968dd9ec0723a97d3aa/wibuwalijedenolik.pdf
    • https://gtsonline.nl/wp-content/plugins/super-forms/uploads/php/files/b7dk29tn122uebmo6qg73glfda/sudemolifirujujufevoxar.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=what+is+a+good+nursing+pico+question
    • 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_off0000f170.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF170 16792 bytes
font_01_sfnt_off00010982.bin
cd44077aeffdebcc969fb3d3bbf8150b5673456a5d7b67592d31af5d495a2ac7
pdf-font-stream PDF embedded font (sfnt) at offset 0x10982 16524 bytes
font_02_sfnt_off00013453.bin
d8793bcaac5b49287021b2ff5029ad5fecec7d1d1cf5951fbf9a78bfec8a52a8
pdf-font-stream PDF embedded font (sfnt) at offset 0x13453 10988 bytes