Malicious PDF — malware analysis report

Static analysis result for SHA-256 7498df714880e128…

MALICIOUS

PDF

95.5 KB Created: 2021-09-19 18:31:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f3de70c5203a90cd9dda4656dbaea43b SHA-1: 297a1500786dc6eee87268d29bdbe78f5606b170 SHA-256: 7498df714880e128719286ec75d1e7dd12f62fda82aceb2087daed4f12b2188c
126 Risk Score

Malware Insights

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

The PDF was flagged by ML and ClamAV as malicious, exhibiting characteristics of a link farm with numerous links to unknown PDFs hosted on disposable domains. The presence of many distinct hosts and a high number of links per host suggests an attempt to distribute malicious content or conduct phishing by luring users to external, untrusted sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9935

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://vesimport.ru/userfiles/file/45287336196.pdf
    • http://mathrainbow.com/userfiles/file/kovawipatuxos.pdf
    • http://ilsungwarehouse.com/userData/ebizro_board/file/86105625062.pdf
    • https://bodykneadstherapy.com.au/ckfinder/userfiles/files/54064736975.pdf
    • https://sahodayabbsr.com/test/fckeditor/file/wavutesupixeza.pdf
    • http://icmasistemas.com/userfiles/files/56262287050.pdf
    • http://orthodoxvaidikasanghom.org/userfiles/file/91884352647.pdf
    • https://transcendenceit.com/wp-content/plugins/super-forms/uploads/php/files/32804e979662ffb12d20055fdd7ec927/89944768380.pdf
    • http://www.thaiboat.net/image/upload/File/busibunewebepumes.pdf
    • https://www.peltonfell.org.uk/ckfinder/userfiles/files/55971635187.pdf
    • http://francescofesta.it/userfiles/files/86221830729.pdf
    • http://chemonova.com/FCKeditor/file/8172596129.pdf
    • http://nontaromclinic.com/ckfinder/userfiles/files/34675357334.pdf
    • http://15449010.com/FileData/ckfinder/files/20210917_6977E1500D594DF3.pdf
    • http://iccjsc.vn/images/uploads/files/xexetiduvubikokuj.pdf
    • https://marathonblainville.com/userfiles/files/vexotare.pdf
    • http://hindustanadvancedsolution.com/t/tutorfirm/uploads/ck/files/97897138183.pdf
    • https://chsins.tw/uploads/files/202109141355345738.pdf
    • https://alzubidi.com/userfiles/files/11418213487.pdf
    • http://ristorantebiscione.com/userfiles/files/90294572557.pdf
    • https://artasedanasingaraja.com/uploadfck/file/jilekatogokadem.pdf
    • https://mp2020.csysadmin.com/ckfinder/userfiles/files/rilokimogilijekebitedidif.pdf
    • http://biomehl.com/images/content/files/8512588785.pdf
    • http://halaljones.com/uploads/files/mapuwukeduwojod.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=7+habits+of+highly+effective+families+ebook
    • 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_off00010eb1.bin
fa58731e887e344c0bf5d68d8660e35e0d6fb434a3d9441662966f0f96db8c88
pdf-font-stream PDF embedded font (sfnt) at offset 0x10EB1 10944 bytes
font_01_sfnt_off00012837.bin
ab65b9795ef941c1ff02afd180898479c19f8aca4a44bc5183d4d3c206b92252
pdf-font-stream PDF embedded font (sfnt) at offset 0x12837 18496 bytes
font_02_sfnt_off00015867.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x15867 16792 bytes