Malicious PDF — malware analysis report

Static analysis result for SHA-256 04128953bac8c1ee…

MALICIOUS

PDF

82.9 KB Created: 2021-09-17 02:06:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: c2e5369365d00c909fe314d6b3ff08a5 SHA-1: 1bd6766a6dbc8fb147be91ce16d29bcbf989fcbe SHA-256: 04128953bac8c1ee316d43605ad40a2c2411bb128dad5f66b22c401bb1de632b
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. It contains a large number of embedded URLs pointing to various domains, suggesting a phishing or malware distribution campaign. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically indicates the document's purpose is to host numerous links on disposable domains, further supporting the phishing or malware lure attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 https://pixomot.ru/uplcv?utm_term=australian+mobile+casino+no+deposit+bonus+codes PDF link annotation
    • https://easternresources.net/ckfinder/userfiles/files/varugufoja.pdfIn PDF document text
    • https://metrosecuritynepal.com/assets/userfiles/files/gawolefotidelezirewivivew.pdfIn PDF document text
    • http://pamatudarbai.lt/ckfinder/userfiles/files/bipivarizati.pdfIn PDF document text
    • https://lacausedeslivres.com/userfiles/file/82829533555.pdfIn PDF document text
    • http://residencelesaline.it/userfiles/files/defulafewijoradapofiloga.pdfIn PDF document text
    • https://binarbaid.com/public_html/userfiles/file/69240627399.pdfIn PDF document text
    • http://barbusci.it/maisUserFile/file/sunovudugejekitefuped.pdfIn PDF document text
    • http://christmaslandint.com/userfiles/zujizasosujedogazet.pdfIn PDF document text
    • http://www.maderas-navarro.com/ckfinder/userfiles/files/linoguvunur.pdfIn PDF document text
    • http://konferencii.org/web/uploads/assets/file/6176376872.pdfIn PDF document text
    • https://loffoxfitness.mvwebsolution.com/userfiles/files/sujefabo.pdfIn PDF document text
    • http://worldofpacifiers.com/editor_uploads/system/files/12916608438.pdfIn PDF document text
    • http://kanalizace-ul.cz/userfiles/file/pelusomolowupomon.pdfIn PDF document text
    • http://timocomputer.cz/files/file/bovasowiloko.pdfIn PDF document text
    • https://ihappywash.com/uploads/files/202109041043301059.pdfIn PDF document text
    • http://cdwy028.com/uploadfile/file/20210903073714.pdfIn PDF document text
    • https://medpressa.ru/files/file/61737027978.pdfIn PDF document text
    • https://spbmworld.com/anaeter_capital/siteadmin/userfiles/files/zomusoto.pdfIn PDF document text
    • https://kamarkosong.com/contents/files/22563995133.pdfIn PDF document text
    • http://dcbestwings.com/uploads/files/92202326431.pdfIn PDF document text
    • http://cana.vn/uploads/userfiles/file/zogesutuxuwetu.pdfIn PDF document text
    • http://www.sauminandy.com/fckimages/file/mibereperokezekojo.pdfIn PDF document text
    • http://ros-grad.ru/fck_editor_files/files/64643341691.pdfIn PDF document text
    • https://santa.sg/images/users/00000000/files/97994479902.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_off0000daf9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAF9 18436 bytes
SHA-256: 8818e588c9c1c6b80bed7400c23c84a30e38f1d2c5ad6d2e937b28e524936568
font_01_sfnt_off00010a73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A73 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001228a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1228A 10896 bytes
SHA-256: c8dea029306f10d8aca5a0b0cc6d837fd2c4ada8319fe0aa0b1112e304121c13