Malicious PDF — malware analysis report

Static analysis result for SHA-256 9498fe915bcf087d…

MALICIOUS

PDF

106.1 KB Created: 2021-07-01 15:55:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c1cd19167e1daed97fe4c56623a60a8d SHA-1: 1e0c51c35d063f3f9b1c9f6f623d63fd33f83918 SHA-256: 9498fe915bcf087df3c692949a2752f88e6d55852e4897bb292626e1d3d612c4
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous links pointing to compromised WordPress sites, specifically targeting file upload functionalities. These links likely serve as a distribution point for further malicious content, such as phishing pages or malware payloads. The presence of multiple links on disposable hosting and the use of UTM parameters suggest an attempt to obscure the true malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9926

Heuristics 6

  • 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.
  • 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://tamtam.com.ua/wp-content/plugins/super-forms/uploads/php/files/e13c702170cb305ce4a627c8dadad612/tiborikegokez.pdf
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c73a6ba09e---tenopamajubamewulaz.pdf
    • https://samngaimarble.com/html_upload/file/puzusiketefasaj.pdf
    • https://swotin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb2d6c5a2d2---25791742719.pdf
    • http://kirks-pool.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7d871b725c---zalebinitiwutos.pdf
    • http://brookhavenclassof1967.com/clients/0/0c/0ca802fc87877f8c548ddf85495caeb2/File/sakiredifuxegu.pdf
    • http://workprohealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084c1cf0346e---banolid.pdf
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608bf63c3fe86---75496848906.pdf
    • http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609ba6e3c7c3e---26169123056.pdf
    • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c9aa20b0469---bozojiworidegipis.pdf
    • http://highspiritsmusic.com/ckfinder/userfiles/files/19387483428.pdf
    • https://www.themeshcowork.com/wp-content/plugins/super-forms/uploads/php/files/26ff06445813e84509e5d87879bea0ab/58709213317.pdf
    • https://f1com.ge/wp-content/plugins/super-forms/uploads/php/files/3bc0ac225e64a04aa0538a99d0baa925/nimugonemegalarepikep.pdf
    • https://www.duffylighting.com/wp-content/plugins/super-forms/uploads/php/files/40736fede4f42004d8e666be4b1a9884/bexebipisu.pdf
    • http://global-poseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d609f34307---widakemibore.pdf
    • http://www.ambredore.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1925350cdc---2775444056.pdf
    • https://harpethvalleyhealth.com/wp-content/plugins/super-forms/uploads/php/files/2ddd7e5507abe2f6a27f6f6bdb0d6992/77119840321.pdf
    • https://homeaestheticsllc.com/wp-content/plugins/super-forms/uploads/php/files/8581ad9320b4315dc5b78a612b3d2442/71216441091.pdf
    • https://robertbah.si/files/file/80925737231.pdf
    • http://aftckwt.com/uploads/file/63674832905.pdf
    • https://dhesient.com/media/46275747690.pdf
    • https://geneticapanama.com/userfiles/file/82604809967.pdf
    • http://middlegeorgiacoinclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607425b30be00---34280921108.pdf
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/160953706e2308---zugogigajelakixikuletumi.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=famous+people+from+frederick+md
    • 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_off00013a68.bin
dcf48f42825dee96c349d1aaa0e7f1406c9b48dcc5b5a8c848bd2e2ddc492052
pdf-font-stream PDF embedded font (sfnt) at offset 0x13A68 18296 bytes
font_01_sfnt_off00016a64.bin
40cb19f67c3c9398dd62bdd5883443b36a11ff537fda35688ef79bb8dd3ec6f1
pdf-font-stream PDF embedded font (sfnt) at offset 0x16A64 10748 bytes
font_02_sfnt_off0001831a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1831A 16792 bytes