Malicious PDF — malware analysis report

Static analysis result for SHA-256 d14bceede5913229…

MALICIOUS

PDF

82.0 KB Created: 2021-04-05 00:07:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f72ced7193f2724fe7fd96acfc27633a SHA-1: 204e1c46bde4893c138740b64e4ebc86e8bb8982 SHA-256: d14bceede5913229cef55f34110bab8fc9b49fd845b3fc806396242dff641517
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, a common tactic for link farms or phishing lures, as indicated by the PDF_SEO_LINK_FARM heuristic. The ML classifier and ClamAV detection strongly suggest malicious intent. The embedded URL 'https://xezojetit.ru/123?utm_term=australia+partner+visa+form+40sp' appears to be the primary lure, disguised as a visa form.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://xezojetit.ru/123?utm_term=australia+partner+visa+form+40sp
    • http://bimoriz.getenjoyment.net/defects_in_brick_masonry.pdf
    • http://timinome.getenjoyment.net/xizojaviwaxin.pdf
    • https://setejurisu.weebly.com/uploads/1/3/2/7/132740540/1177955.pdf
    • http://dewisazovuvoxi.mywebcommunity.org/5958840913.pdf
    • http://nidewopovuwubo.mypressonline.com/gazobimovafarojoxi.pdf
    • http://giwitijudaleka.mygamesonline.org/abdomen_agudo_quirurgico_2020.pdf
    • http://sazulido.medianewsonline.com/ferguson_anti_politics_machine_summary.pdf
    • https://jopakawinotu.weebly.com/uploads/1/3/1/4/131407654/1670235.pdf
    • http://vemelaribox.getenjoyment.net/mapamundi_fisico_con_nombres.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/musoxifuvitalo/dumomizobagedanek.pdf
    • https://s3.amazonaws.com/safenalavojuwu/epson_xp-200_printer_price.pdf
    • https://s3.amazonaws.com/dejazuvorira/how_to_login_as_admin_on_router.pdf
    • https://s3.amazonaws.com/paxunu/30351129978.pdf
    • https://s3.amazonaws.com/jajoxulabojaso/gepilujutusepux.pdf
    • http://piwakitidi.onlinewebshop.net/wubakijowarubug.pdf
    • https://s3.amazonaws.com/voxipanovigepiv/57095072415.pdf
    • https://s3.amazonaws.com/rekorewexidiwo/13th_finance_commission_report.pdf
    • https://s3.amazonaws.com/rumezo/indefinite_employment_contract_template.pdf
    • https://s3.amazonaws.com/gatazeromij/suddenlink_tv_guide_el_dorado_ar.pdf
    • https://s3.amazonaws.com/negonanopix/97378808718.pdf
    • 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://scripts.sil.org/OFL
    • 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_off0000eba7.bin
ab7f368a476fd83f29c7f3b78a0a5bd7070ce261e01e41809042e6bf66e1db21		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEBA7 5328 bytes
font_01_sfnt_off0000fdb8.bin
ecd8baf0aaaf186ece4b0ff5d5825e9f536b5783ecd7ab097138248978a0fb53		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFDB8 11696 bytes
font_02_sfnt_off0001254f.bin
9af6fc3bf9d751f70540aea0fa47faa159a3604992cda23d2adcda3ffc5346b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1254F 16092 bytes

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