Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e7d92456b7ef5cd…

MALICIOUS

PDF

82.6 KB Created: 2021-09-16 08:48:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 052476da7905a3ab9376e12095332f64 SHA-1: 064b794ecd1fcac028a7b430bd09b044831396e9 SHA-256: 7e7d92456b7ef5cd82b522897f0114e4cb7e8a046bea3db5b3fd4979a92a48ce
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan payload. It contains numerous embedded URLs, with one heuristic specifically identifying a 'link farm on disposable hosting' which is a common tactic for distributing malicious content. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect the user to a malicious site, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://dogalakustik.com/depo/sayfaresim/file/65386871907.pdf In PDF document text
    • https://polaria.cz/images/file/12679325553.pdfIn PDF document text
    • https://timminsrenovations.ca/file/WstKC9yQBBBuHAGa.pdfIn PDF document text
    • http://ncdesign.it/userfiles/files/28402784727.pdfIn PDF document text
    • https://jurvamartin.com/userfiles/file/befepolikevet.pdfIn PDF document text
    • http://studio-castiglioni.com/userfiles/files/93850984535.pdfIn PDF document text
    • http://mariancozma.com/_user/file/libijopix.pdfIn PDF document text
    • http://www.louisefarmersmith.com/admin/ckeditor/ckfinder/userfiles/files/59960484847.pdfIn PDF document text
    • http://goref.ru/files/file/pezudoge.pdfIn PDF document text
    • https://gencshow.com/upload/ckfinder/files/36887179510.pdfIn PDF document text
    • https://www.sahabatkeluargahomecare.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c8d05eedb0---givozunumoxuvifigete.pdfIn PDF document text
    • https://globalybm.com/ckfinder/userfiles/files/1631330195.pdfIn PDF document text
    • https://jensbrode.de/files/file/42667318177.pdfIn PDF document text
    • http://lab4050.com/upload/editor/file/bamatigorodamirirelelu.pdfIn PDF document text
    • https://oferta.lt/i/File/desapigaworafurevu.pdfIn PDF document text
    • http://www.trackls.com/application/ckeditor/ckfinder/userfiles/files/mivem.pdfIn PDF document text
    • http://anshan56.cn/userfiles/file/16305844621970637385.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=three+waves+of+volunteers+and+the+new+earth+pdfPDF 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://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_off0000e01c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE01C 10720 bytes
SHA-256: 4762c6c2b5cee16fdc4bd578011726461049cd32090dfe5f9435ab7ea2e2af1e
font_01_sfnt_off0000f8cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8CB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000110dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110DD 17256 bytes
SHA-256: 42e5cb5ce450ccb1e5b4bd404275f154a0f449fc4ede2c8357773dc15571bd06

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