Malicious PDF — malware analysis report

Static analysis result for SHA-256 07f07e052a47fcb8…

MALICIOUS

PDF

74.1 KB Created: 2021-03-26 09:29:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 31a2460ea1c47959a2f2a0ec1da9b759 SHA-1: 268099ffd7214c0db4a475cb82eadad0fbfc32de SHA-256: 07f07e052a47fcb8ab42fc092ae7c5e51271abc8283201d74db42e6ee007231f
156 Risk Score

Malware Insights

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

The PDF file contains a link farm with numerous external links, suggesting an attempt to drive traffic to malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. The document body, though heavily obfuscated, mentions 'Wifi tool analyzer scanner', which is likely a lure to entice users to click on the embedded malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://vilenefex.ru/123?utm_term=wifi+tool+analyzer+scanner
    • https://bipusisep.weebly.com/uploads/1/3/0/7/130775903/5105286.pdf
    • https://xamubamujizej.weebly.com/uploads/1/3/1/4/131483378/36fdcc6df882.pdf
    • https://cdn.sqhk.co/mapibeze/gfichg1/dovoruwadaro.pdf
    • https://cdn.sqhk.co/livixugakuf/9iihca9/gamescart_new_games_and_friends_challenges.pdf
    • https://nelubetif.weebly.com/uploads/1/3/5/3/135322580/nipefazofuk-wotagefo.pdf
    • https://retevewaluwur.weebly.com/uploads/1/3/4/6/134600892/3291408f.pdf
    • https://gogozofoful.weebly.com/uploads/1/3/4/5/134512065/nijozejevuse.pdf
    • https://cdn.sqhk.co/gepabafi/yihhgja/city_car_driving_simulator_download_2018.pdf
    • https://cdn.sqhk.co/luwonowuwig/jacxYgg/service_costing_system.pdf
    • https://ramasiwo.weebly.com/uploads/1/3/5/3/135390431/a70b34ec597dadf.pdf
    • https://boxemafal.weebly.com/uploads/1/3/3/9/133997404/penifufinesiz.pdf
    • https://nawawedivoxoni.weebly.com/uploads/1/3/4/7/134719505/tewubetugu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://d1159ab4-cbf5-42eb-897b-83a5e94cd7da.filesusr.com/ugd/536122_c6aec7f4ab784c0798ac9fda63c5de00.pdf?index=true
    • https://s3.amazonaws.com/webipejonavuv/34047893130.pdf
    • https://cd9ed9ec-87d1-42be-9198-0b2de6c1db4d.filesusr.com/ugd/158fb9_cb900f943b224b78bba77c3c6fd2eb98.pdf?index=true
    • https://s3.amazonaws.com/saxefi/avicularia_variegata_care_sheet.pdf
    • https://s3.amazonaws.com/fokapikow/commutative_law_worksheet_year_3.pdf
    • https://e5eb5b25-b33c-43e3-82d5-57ab1bf863d8.filesusr.com/ugd/b0c717_d9dbe8104f8b4a89a4347aefd264d648.pdf?index=true
    • https://d5cf7a15-73c9-49c9-ad57-d4f0303abb0c.filesusr.com/ugd/0d002d_92fd7678d1384ae6a1af9a40bf74bcb2.pdf?index=true
    • http://nubotediliwut.epizy.com/22417921764.pdf
    • http://zakidudo.epizy.com/65721241346.pdf
    • http://lefanivewog.epizy.com/vedidokokidujule.pdf
    • https://s3.amazonaws.com/xumakomowi/65928973266.pdf
    • https://4ec63ec4-77bf-4499-900e-7c522af20654.filesusr.com/ugd/35bdb9_7350f28119e147cfb668a6d042d9c9b5.pdf?index=true
    • 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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e661.bin
3807164099a590f94c0cd77949146ecdb394af445d21eff04acce8aae33c97dc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE661 5040 bytes
font_01_sfnt_off0000f7b8.bin
3b091d3c0cc52da2d2e930088b333a27f00d2c551a6c647b8534fef4f1118b86		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF7B8 10408 bytes

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