Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e43499b28363c55…

MALICIOUS

PDF

79.3 KB Created: 2021-09-13 16:56:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: af5d9d4b1783044f858615371e5d04ec SHA-1: 7fc12886b248e1fbfa29f9552aaa3b42bd1cbc05 SHA-256: 5e43499b28363c55db3123e3ed2a2fe01d15549754b32800612428cc4e501a00
166 Risk Score

Malware Insights

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

The PDF document was flagged by ML classifiers and ClamAV as malicious, exhibiting characteristics of an advance-fee scam. It contains numerous embedded URLs, many of which point to PDF files hosted on various domains, suggesting a potential phishing or malware distribution scheme. While no scripts were explicitly extracted, the nature of the embedded URLs and the scam lure indicate a high likelihood of malicious intent, possibly involving the download of further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9958

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
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://gbfrjournal.org/pds/userfiles/files/12637312174.pdf
    • https://creativitagh.com/pevron/www/img/file/xarumamezesapopa.pdf
    • http://agataklimowska.pl/userfiles/file/60364959775.pdf
    • https://www.phuketvillarentalandservices.com/ckfinder/userfiles/files/58036418616.pdf
    • https://finestblogger.de/wp-content/plugins/super-forms/uploads/php/files/cdck851bvpvrrsod82g5anrvkp/24650005391.pdf
    • http://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/161383a11448be---93460137949.pdf
    • http://nfrostov.ru/upload/files/48755904200.pdf
    • https://highrise.pl/file/58044869825.pdf
    • http://fluorescent-training.com/file/turosoxozefowosej.pdf
    • http://biplano.eu/userfiles/files/44653243272.pdf
    • https://gitedu.in/ckfinder/userfiles/files/16481218093.pdf
    • http://tcgardening.com/userfiles/file/2021090417010373499.pdf
    • http://xn--2e0b30g3uq7pay7m.com/upload/fckeditor/file/7192224105.pdf
    • https://greenlandpark.com/uploads/files/takilugawowozul.pdf
    • https://reparationmobile.net/userfiles/file/tewugagepuxewupove.pdf
    • http://studioiulianella.it/userfiles/files/sikusoxeramiderun.pdf
    • https://brtim.com/uploads/wysiwyg/files/gikuwubaxani.pdf
    • https://produktybhp.pl/pliki_user/File/rabafikiliwedisinunuz.pdf
    • http://brainbond.ro/userfiles/file/61719935439.pdf
    • http://abwsalisbury.com/uploads/files/janubipejasoguzigutap.pdf
    • http://chernogolovka.inhome360.ru/admin/ckfinder/userfiles/files/34616398230.pdf
    • http://hoinhikhoavn.com/img/files/ponerobiruvefaguwi.pdf
    • http://www.siposferenc.hu/html/vosigilapozitimor.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=smart+launcher+review
    • 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_off0000d2e7.bin
fce27bb158bb19068dc5d3f187dcd1064d88062a9366ba0409468275c9ed4e5e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD2E7 10536 bytes
font_01_sfnt_off0000eab9.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEAB9 16792 bytes
font_02_sfnt_off000102cb.bin
bd524dfa3fe59ee4774c5819494f4b421c32ccabb797b84ffa8793c2ed4e3160		 pdf-font-stream PDF embedded font (sfnt) at offset 0x102CB 17528 bytes

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