Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e27ae04cf149fea…

MALICIOUS

PDF

83.7 KB Created: 2021-09-12 18:05:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 16778c734732fdb29a572bd11a6e0780 SHA-1: eb4a43c51931b5d3e246b44f22cfb0468aeff4ea SHA-256: 3e27ae04cf149feae6818973b815f84a9550c97b094d9c04f729392f7d0e00cf
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs pointing to various domains, suggesting a link farm designed to redirect users to potentially malicious content. The presence of these links and the high detection scores indicate a clear intent to deceive or compromise the user.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9931

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://telewebmarketing.com/FCKeditor/file/8377760602.pdf In PDF document text
    • http://boothbayharborshipyard.com/userfiles/file/bagekegidurasikapotape.pdfIn PDF document text
    • http://fslawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/80773287428.pdfIn PDF document text
    • http://elmbbq.com/uploads/files/28279613734.pdfIn PDF document text
    • http://ukrfirework.com/images/file/61866364406.pdfIn PDF document text
    • http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/161367b3eaa17b---88452188347.pdfIn PDF document text
    • http://artdental.hu/editor_up/17135577073.pdfIn PDF document text
    • http://basar-hemeringen.de/ablage/userfiles/files/92684864762.pdfIn PDF document text
    • http://bestforfishing.com/wp-content/plugins/super-forms/uploads/php/files/3279f3b457a4b4e7b357daaacd479dc9/puzesavadokov.pdfIn PDF document text
    • http://k3projekt.pl/uploads/userfiles/files/bovozepekunafivikibapi.pdfIn PDF document text
    • http://ondrejkocar.cz/img/file/57122913768.pdfIn PDF document text
    • https://serwisnawigacji.pl/userfiles/file/13167554496.pdfIn PDF document text
    • http://tiszaikaland.hu/upload/file/68195874883.pdfIn PDF document text
    • http://aroma-es.red/yamituki-n/uploads/files/kurujafo.pdfIn PDF document text
    • https://romalasergroup.com/userfiles/files/56745125640.pdfIn PDF document text
    • https://greenline.bg/userfiles/file/72091657023.pdfIn PDF document text
    • http://zvezda-rostov.ru/ckfinder/userfiles/files/lapuloraso.pdfIn PDF document text
    • http://abwrosedale.com/uploads/files/wugiwekutukot.pdfIn PDF document text
    • https://b7b.reviewz.eu/app/webroot/files/userfiles/files/doxibajunuvepikol.pdfIn PDF document text
    • http://hoitruyengiaocodocvietnam.com/uploads/image/files/14576481447.pdfIn PDF document text
    • http://lionsmarsala.it/userfiles/files/29019426526.pdfIn PDF document text
    • http://nasledie-sluck.by/var/upload/file/vavuvurodilufoju.pdfIn PDF document text
    • https://acp-luxusingatlanok.hu/ckfinder/userfiles/files/90599519860.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=cod+black+ops+zombie+apkPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c739.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC739 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000df50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF50 10696 bytes
SHA-256: 3bfb38ad6d668e556ad94631ff26e64f08551cbf2ef8734bcec2255b554be026
font_02_sfnt_off0000f7a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7A9 19720 bytes
SHA-256: 103979b331b78d49f65dffb97b00908e89ae10cedf294d4665497c16f80b357e
font_03_sfnt_off00012b25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B25 16232 bytes
SHA-256: e06ebeaa2bb94d9bf14337b0794fec2c9c4a66e30291689b6f6234bfe360c8a5

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