Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0c6522fa85e027b…

MALICIOUS

PDF

75.3 KB Created: 2021-09-10 04:59:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 9a391c560cad89840c977880ad997130 SHA-1: 3e8aea63d416ee91d4ac928b2fc50c2fad20fc23 SHA-256: d0c6522fa85e027b100db01997e0e8134865d561d2974129f08018d94d61fe2e
166 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of the 'SE_PASSWORD_ARCHIVE_LURE' heuristic suggests the document attempts to trick users into downloading a password-protected archive, a common tactic for evading initial security scans. While no scripts were directly extracted, the PDF structure and numerous embedded URLs point towards a phishing or malware distribution scheme, likely initiated via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://www.hmgfinance.com/ckfinder/userfiles/files/sikewajuvidoratexaxupep.pdf In PDF document text
    • http://wamaeassociates.com/images/uploads/originals/file/89752336696.pdfIn PDF document text
    • http://sangtaoad.com/uploads/userfiles/file/viwunupegagapipalogu.pdfIn PDF document text
    • https://pet-fashion.ro/mm/file/240626028.pdfIn PDF document text
    • https://ultralloy.net/upload/files/bofojovonuwukuw.pdfIn PDF document text
    • https://soalmatematik.com/userfiles/file/desidulevuribefugisewap.pdfIn PDF document text
    • https://hse.tw/upload/file/fabel.pdfIn PDF document text
    • https://petala.gr/userfiles/file/botavotosube.pdfIn PDF document text
    • http://wixoon.hu/upload/file/11068645374.pdfIn PDF document text
    • http://eventechsite.com/files/files/97401225950.pdfIn PDF document text
    • http://cartopack.be/Images/file/xijolalifajesuj.pdfIn PDF document text
    • http://sonhanint.com/uploadpic/sun/files/202109032132156264.pdfIn PDF document text
    • http://nwhouse.ru/uploads/file/46236161982.pdfIn PDF document text
    • https://minhvuongthuphap.com/upload/ck/files/zoritilirofulibulevot.pdfIn PDF document text
    • http://floral-design-lindgens.de/userfiles/file/96596167476.pdfIn PDF document text
    • http://mijn-nederland.nl/userfiles/file/xololudivuwuferedut.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/487c2f6358fc74fac7857a5cdb425242/46637134927.pdfIn PDF document text
    • http://realestatespoznan.com/uploads/91054776950.pdfIn PDF document text
    • http://kanoonkaraj.ir/dbmanager/filebank/htmlgallery/file///12131892674.pdfIn PDF document text
    • http://www.ags-sib.ru/ckfinder/userfiles/files/22619172872.pdfIn PDF document text
    • https://klubkanine.com/home/klub/public_html/ckfinder/userfiles/files/numapibekobawuropiz.pdfIn PDF document text
    • http://dj-maily.com/uploads/pages/files/31130479533.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=how+to+know+the+password+of+your+phonePDF 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_off0000bf3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF3D 10840 bytes
SHA-256: 8a36ec862d30860a8494f171e4345f943531faf83acc945e373d0e53a7674851
font_01_sfnt_off0000d846.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD846 18268 bytes
SHA-256: 6f4c94eada1473bd43f6bad2273cacc0561ba62558ccfd1fd305ef47ad99bd77
font_02_sfnt_off0001074b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1074B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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