Malicious PDF — malware analysis report

Static analysis result for SHA-256 522ed6b7bebb25bf…

MALICIOUS

PDF

102.2 KB Created: 2021-09-03 22:42:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 6acb4fd8bd28d8977c305d23af32747e SHA-1: bc96e2f376f7cdc9f3e1dcf88b4ee09993b2ba13 SHA-256: 522ed6b7bebb25bf2dcdf7f18da59cb68ae9b0d186da350eb1a38178842120d9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV detecting it as a phishing trojan. It contains numerous external links, many pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of embedded JavaScript, though not fully analyzed here, is a common technique for exploiting PDF viewers or initiating further malicious actions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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://smidgel.ru/uplcv?utm_term=when+you+believe+choral+arrangement+pdf PDF link annotation
    • https://eccdc.org/application/webroot/userfiles/file/wanufivabilidoken.pdfIn PDF document text
    • https://earthideasawnings.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084e5d087f61---8136126171.pdfIn PDF document text
    • https://m3csrl.com/file/fagidemesodoxofagixajoga.pdfIn PDF document text
    • http://tvtamminhphat.com/uploads/userfiles/file/81836461005.pdfIn PDF document text
    • http://jnnycc.org/userfiles/file/82591827969.pdfIn PDF document text
    • http://www.kidnuri.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072da9ab435e---68118166482.pdfIn PDF document text
    • https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607978bcef5fa---bobomuvuze.pdfIn PDF document text
    • http://tubietelbar.hu/uploadfile/xevimijawixototaz.pdfIn PDF document text
    • http://mishelik.ru/userfiles/file/manoxaxokur.pdfIn PDF document text
    • http://teraval.cz/res/file/88625848337.pdfIn PDF document text
    • https://hogies.com/includes/template/uploads/file/gonejonirozuko.pdfIn PDF document text
    • http://driver-jazda.pl/upload/file/gokovif.pdfIn PDF document text
    • http://lussoleathertiles.com/test4/EDITOR/example/v2/userfiles/file/25187947428.pdfIn PDF document text
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a2db0818f8b---voduwijozufulajid.pdfIn PDF document text
    • http://terwaarde.be/ckfinder/userfiles/files/bapifunezamogegowoduf.pdfIn PDF document text
    • http://azizavacanze.com/userfiles/files/354251508.pdfIn PDF document text
    • https://qualitylightsolutions.com/wp-content/plugins/super-forms/uploads/php/files/bfa833390c3fab1a2a23e27ad81872be/petoniboka.pdfIn PDF document text
    • http://www.goldenlantern.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160afb0570368b---46259204478.pdfIn PDF document text
    • https://actor-conseil.com/files/file/fumobalamixakebolitekafo.pdfIn PDF document text
    • http://aan.kz/ckfinder/userfiles/files/50488173235.pdfIn PDF document text
    • https://xn----9sbccjdbca7cyaieg1a3j.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/d29efc901d057dd3a361af587568a7c6/15820471342.pdfIn PDF document text
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/1d61uia4dhlc762d0joef34b76/29296133756.pdfIn PDF document text
    • http://vendingchat.ru/uploads/ckfinder/files/54200241353.pdfIn PDF document text
    • 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_off000127e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127E2 18808 bytes
SHA-256: 7e4726e9e629ccdbf90ccb18d022ea183c973122386c5f40452ec6a10df5fca5
font_01_sfnt_off000158f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x158F7 11312 bytes
SHA-256: 97bf9a7aafc494c8bda40c101ee2d7f8822046ac9d2b74f404d79d2e0e508192
font_02_sfnt_off000172fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x172FE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.