Malicious PDF — malware analysis report

Static analysis result for SHA-256 25156b0f394c0666…

MALICIOUS

PDF

73.5 KB Created: 2021-10-02 21:54:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: fde12b94a3793e344a76e34d1d280e3f SHA-1: 55a49342a30827023bdd4ab0e20eb0eaef58310a SHA-256: 25156b0f394c0666c59723eaa21cccab9cceff4fd16f36765fa77d7136d22164
94 Risk Score

Malware Insights

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

The file was detected as a phishing trojan by ClamAV. It contains numerous embedded URLs, many of which point to other PDF files hosted on various domains, suggesting a link farm or distribution network. The PDF's structure and the presence of many external links indicate a malicious intent to redirect users or host further malicious content.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4113

Heuristics 4

  • 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
  • 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://autotoner123.com/home/autotone/public_html/ckeditortest_WORKING/ckfinder/userfiles/files/63252396373.pdf In PDF document text
    • http://chi-kara.net/Upload/files/72110070638.pdfIn PDF document text
    • http://royalgoodviewresort.com/Uploads/file/kipikilener.pdfIn PDF document text
    • https://derechosenred.org/aym_image/files/76009353476.pdfIn PDF document text
    • https://maurinet.com/userfiles/file/lukivakeleresegi.pdfIn PDF document text
    • https://olgunbey.com/upload/ckfinder/files/4738821222.pdfIn PDF document text
    • http://onfireinteriors.com/userfiles/wakuwexivefos.pdfIn PDF document text
    • https://www.poeles-granules-vasconha.fr/ckfinder/userfiles/files/towujowunejapodadiw.pdfIn PDF document text
    • https://questyme.ca/userfiles/file/kupafubowadotukub.pdfIn PDF document text
    • https://bilegt.mn/userfiles/files/nekebupajakefogojew.pdfIn PDF document text
    • http://magicfood-cn.com/files/20210912212607.pdfIn PDF document text
    • http://erpsamik.com/ckfinder/userfiles/files/fesilesoxazawopewakolu.pdfIn PDF document text
    • http://sanmorales.es/userfiles/files/balowuzokitevo.pdfIn PDF document text
    • http://asid.rw/userfiles/file/girisawiliwaroma.pdfIn PDF document text
    • https://maribon.net/app/webroot/files/userfiles/files/62357763805.pdfIn PDF document text
    • http://turatabor.hu/media/jodosaloviwemazi.pdfIn PDF document text
    • http://bukharajohnscreek.com/sites/default/files/file/kapumutolabazali.pdfIn PDF document text
    • http://rld-carbon.com/file/35575209877.pdfIn PDF document text
    • https://slavica.ru/wp-content/plugins/super-forms/uploads/php/files/292d581cd4c7aca0561b79204abb55b7/lolajobepebaremigalik.pdfIn PDF document text
    • https://tybistanbul.org/resimler/files/91520471738.pdfIn PDF document text
    • https://hacunamatata.ru/wp-content/plugins/super-forms/uploads/php/files/b97ba40d948b60dff71fec60b64abab2/dapure.pdfIn PDF document text
    • https://www.hippocratio.gr/ckfinder/userfiles/files/75187915696.pdfIn PDF document text
    • http://hotdeals24x7.com/ci/userfiles/files/moxovijux.pdfIn PDF document text
    • http://infrabud.eu/fckpliki/file/57206687749.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=my+hero+academia+one%27s+justice+2+english+dubPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c338.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC338 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000db4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB4A 20764 bytes
SHA-256: 4646c085e753b15b7df63278a67e559476565256273f0bfba12341f80efdfb1a