Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a3a0b96b7ebe488…

MALICIOUS

PDF

83.8 KB Created: 2021-09-19 22:18:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 362885311b13cf77c8195ee1067cc6bf SHA-1: bf383d29341b51fb3dfcae2ece0dbdc428fa5cab SHA-256: 6a3a0b96b7ebe48840719863e3050168d845e01d713ff921f34967d81ca5d2f2
146 Risk Score

Malware Insights

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

The PDF contains numerous embedded URIs, with several heuristics flagging it as a link farm and potentially malicious. One URI directly uses an IP address, increasing suspicion. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware delivery through the linked sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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 https://oniceh.ru/uplcv?utm_term=stream+boxing+ppv PDF link annotation
    • https://lux-ride.com/home/u4-6pzgszajsb5u/www/lux-ride.com/public_html/ckeditortest_WORKING/ckfinder/userfiles/files/78549037457.pdfIn PDF document text
    • http://dakmoto.cz/obrazky/file/3094932415.pdfIn PDF document text
    • https://podereilmontaleo.it/writable/public/userfiles/file/fikozilowajenasutu.pdfIn PDF document text
    • http://rungruangsteel.com/public/upload/userfiles/files/87097187311.pdfIn PDF document text
    • http://keralastatetailorsassociation.com/userfiles/file/dopexikijuxerirusawe.pdfIn PDF document text
    • http://ilonew.tasksplan.com/ckfinder/userfiles/files/takubeziwiwuguz.pdfIn PDF document text
    • http://giaydantuongphongkhach.net/images/news/file/7966090744.pdfIn PDF document text
    • https://thuhuonglacquer.com/uploads/news_file/tubeleluvaxarefu.pdfIn PDF document text
    • https://gangnampools.com/contents/files/77748866914.pdfIn PDF document text
    • http://locke-3c.tw/uploads/files/202109170053517421.pdfIn PDF document text
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/161464fc96588b---wotenadoxefomejebuwila.pdfIn PDF document text
    • http://museodegliarazzimarsala.com/userfiles/files/28459847067.pdfIn PDF document text
    • http://drzwiukryte.pl/userfiles/file/21964868407.pdfIn PDF document text
    • https://www.parquesanalbertohurtado.cl/ckfinder/userfiles/files/88619184817.pdfIn PDF document text
    • http://nsdadventist.org/FCKData/file/49809719902.pdfIn PDF document text
    • http://185.33.116.142/~bbyacht01/upload/files/pezava.pdfPDF link annotation
    • http://enotecagaribaldi.it/userfiles/files/zazot.pdfIn PDF document text
    • https://pacantioquia.org/aym_image/files/paninimususef.pdfIn PDF document text
    • https://shevian.com/images/file/tufefoduvosuwezimez.pdfIn PDF document text
    • http://uticachemical.com/files/upload/files/30768140409.pdfIn PDF document text
    • http://anais.terminarz.online/kosmetyczka/krakow/files/85996950161.pdfIn PDF document text
    • http://toonesk.com/upload/40266520473.pdfIn PDF document text
    • http://savytrading.com/userfiles/file/56616912081.pdfIn PDF document text
    • https://olamare.com/img/uploaded/file/18784448946.pdfIn PDF document text
    • https://globalcareerclub.com/FCKeditor/userfiles/file/rigefixige.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e2b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2B2 17840 bytes
SHA-256: 52195a8aff87cfec7289c6aa12593e1cecaff2cec11f1151ec3f9d5397960dca
font_01_sfnt_off0001113c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1113C 10764 bytes
SHA-256: 968f0154fd41e3a8096cedf61b25171151eefaf3064c8285248b23c4440452be
font_02_sfnt_off000129db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129DB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1