Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1d18e9e654cba38…

MALICIOUS

PDF

68.5 KB Created: 2021-09-24 14:30:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7d1186ac37480d13d50d04d2e40c71e9 SHA-1: fc3913e592e347a5fed74642b0704cf3022dccae SHA-256: e1d18e9e654cba3849700696a2c48e88e6e8134fac0603c0d2c0169eaee4a288
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, many of which are hosted on disposable domains, suggesting a link farm or phishing lure. While no scripts were explicitly extracted, the PDF structure and heuristic firings point towards a malicious document, likely intended as a spearphishing attachment to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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://aarogyamedico.com/userfiles/file/wuvizavakewuvo.pdf
    • https://gjbuyerbroker.com/userfiles/file/86003040190.pdf
    • https://aawyx.com/sites/default/imageuser/file/murowul.pdf
    • https://festivaldelmaridaje.com/sgi_userfiles/userfiles/files/tikakorarapewopodagal.pdf
    • http://vucert.vn/uploads/files/botokemipivug.pdf
    • http://burattinojatek.hu/userfiles/file/94008070460.pdf
    • https://hearing-outlet.com/uploads/files/202109120936534847.pdf
    • http://angelojrobles.com/admin_initial_test/userfiles/file/67844183784.pdf
    • https://royal-art.pl/uploads/userfiles/files/88448251671.pdf
    • http://weilandvloeren.nl/fckimages/92430454745.pdf
    • http://lamorenj.com/userfiles/file/vamuduwajetodoxe.pdf
    • http://dragonspond.com/uploads/files/xolimuvazugozamugip.pdf
    • http://theartofdesign.nl/ckfinder/userfiles/files/22635641465.pdf
    • https://icoachyou.biz/images/ckeditor/files/zisonikoki.pdf
    • https://nguyenthelong.net/userfiles/files/34482116229.pdf
    • http://aquitaine.annuaire-regional.com/ckfinder/userfiles/files/fimelufonarusixipoke.pdf
    • https://redengewinnt.com/userfiles/file/jedamaxojifiv.pdf
    • https://frenstravel.com/assets/ckfinder/userfiles/files/jaxuvokulapukenopijas.pdf
    • http://exhibitionchannel.com/upload/60861515996.pdf
    • http://britishcytology.org.uk/ckfinder/userfiles/files/85378349925.pdf
    • https://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138a42fb128b---75536604471.pdf
    • https://speculatio.in/ci/userfiles/files/xijomugi.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=largest+country+by+population
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ad81.bin
b3f78d3851f3f6dc679a087e9fdf0dfd90573cc5d424d4f971ed0903a451894e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAD81 10860 bytes
font_01_sfnt_off0000c68a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC68A 16792 bytes
font_02_sfnt_off0000de9c.bin
832c69de04d698be419f581ae639fc478861e7c23f0d9e389340beca83ced786		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDE9C 15168 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.