Malicious PDF — malware analysis report

Static analysis result for SHA-256 a14e7238d94e5414…

MALICIOUS

PDF

72.1 KB Created: 2021-09-14 07:16:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: ec8dbec15e86fc4dafcb5f8e75326afb SHA-1: 487a8a993579a11d296940fa91eb633aa9c93574 SHA-256: a14e7238d94e5414690551dd2ea0396273a616a171de17fa79817dc4441f2938
126 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. It contains a large number of embedded URLs, many pointing to disposable domains, indicating a link farm designed to obscure the ultimate destination. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious nature. While no scripts were explicitly extracted, the PDF structure and URL distribution suggest it's intended to redirect users to malicious sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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://xn--80age2amlc.xn--80adxhks/pics/images/file/12645932283.pdf In PDF document text
    • http://grafichesirio.com/userfiles/files/pepijedofew.pdfIn PDF document text
    • https://dananeye.com/uploads/files/202109021513594384.pdfIn PDF document text
    • http://levne-pohary.cz/UserFiles/File/buwubasiruwenuwopevabebof.pdfIn PDF document text
    • http://4bx.pl/public/file/kuxudokokabujo.pdfIn PDF document text
    • http://www.studiolegalefusimorelli.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a9ef8ce71e---80694552789.pdfIn PDF document text
    • http://akekaluck.com/ckfinder/userfiles/files/55161232856.pdfIn PDF document text
    • http://personal.sut.ac.th/chantira/port/ckfinder/userfiles/files/54279336508.pdfIn PDF document text
    • https://fsreloading.com/userfiles/files/renoxi.pdfIn PDF document text
    • http://doctour.hu/uploads/ckfinder/userfiles/files/27698483160.pdfIn PDF document text
    • http://ouhkpthaa.org/userfiles/54870032988.pdfIn PDF document text
    • https://www.db-ynox.fr/ckfinder/userfiles/files/84242553845.pdfIn PDF document text
    • https://www.tcf.gov.tr/ckfinder/userfiles/files/bimelilibebovepebevijajav.pdfIn PDF document text
    • http://utcsp2.rustyramone.com/uploads/files/rerajuxu.pdfIn PDF document text
    • http://ferramentabelleggia.it/public/file/41309958410.pdfIn PDF document text
    • http://popmetre.com/news/files/93107486925.pdfIn PDF document text
    • https://repetitorebi.ge/userfiles/files/ranivol.pdfIn PDF document text
    • http://igabana.com/upfolder/e/files/20210908155746.pdfIn PDF document text
    • http://dzstock.com/Upfiles/file/satotedavajem.pdfIn PDF document text
    • http://hk-bbc.com/upload/file/74119075425.pdfIn PDF document text
    • http://casaatlantida.com/userfiles/file///xajazonaxo.pdfIn PDF document text
    • http://elite-nails.pl/Upload/file/subiji.pdfIn PDF document text
    • http://mdsalon.ru/img/lib/file/piwuvawawilesasuxevunawij.pdfIn PDF document text
    • http://linkingpeople.info/userfiles/file/62819853479.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=vishnu+sahasranamam+lyrics+in+teluguPDF 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_off0000b591.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB591 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cda3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDA3 17260 bytes
SHA-256: 84b71776ad0618dd285d3436362fddcc174a729b150082c769e7639d3478bc8a
font_02_sfnt_off0000f9fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9FE 10740 bytes
SHA-256: 63e5460cc497b2990ee57f8a75a37b9d8e0bc90f3868c02334f0420fb6b9b6ac

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