Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9717436f8eb2816…

MALICIOUS

PDF

63.7 KB Created: 2021-09-05 08:50:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 0ac15844bcef0291fe6c5f9e2f8944ec SHA-1: be7557f67f44c8e408b95ab2e308dff49dac244b SHA-256: e9717436f8eb2816a7598a54e06f0693e5cf52e5cc20f68869cc9f3133f336d6
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF file flagged by ClamAV as a phishing trojan. It contains numerous embedded URLs, many pointing to compromised CMS upload directories and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the PDF structure and embedded URIs are indicative of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9500

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.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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
  • 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://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b206b290815---43519577266.pdf PDF link annotation
    • http://mawratanews.com/armedia/uploads/files/53657446584.pdfIn PDF document text
    • https://alshaabcoop.com/userfiles/file/putizewojanodurelapa.pdfIn PDF document text
    • http://vitalbafitnessclub.eu/userfiles/files/mavawararo.pdfIn PDF document text
    • http://www.kliningstroy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160b722b61e539---kisepisud.pdfIn PDF document text
    • http://xn--80aafbkbafwdti1ahihccrg.xn--p1ai/pict/file/76544990760.pdfIn PDF document text
    • https://nowbali.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/1607af7a101f70---19208699686.pdfIn PDF document text
    • http://short-story.ru/upload/file/98396661996.pdfIn PDF document text
    • http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607a08438f19f---37557432729.pdfIn PDF document text
    • https://bakwanudang.com/contents/files/22740083241.pdfIn PDF document text
    • https://www.bussmann-tiefbau.de/ckfinder/userfiles/files/25069096728.pdfIn PDF document text
    • https://zapret-rf.org/web/img/podborky/files/92719916876.pdfIn PDF document text
    • https://giga-tronics.com/userfiles/files/51381304245.pdfIn PDF document text
    • https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/us6l7n1kkahbr0nj8jq335140r/lisupakifox.pdfIn PDF document text
    • http://gillsandgeckos.com/userfiles/file/gerajomebuw.pdfIn PDF document text
    • https://lee-trading.tw/archive/upload/files/kanubufevuvifapepule.pdfIn PDF document text
    • http://bukharageorgia.com/sites/default/files/file/16829203424.pdfIn PDF document text
    • https://parisautotravel.com/wp-content/plugins/super-forms/uploads/php/files/1onf688ep33q04ca312pv2rc83/84602743655.pdfIn PDF document text
    • http://rjbmachinery.com/d/files/dolopiperevolekiwolusife.pdfIn PDF document text
    • https://ewt.cz/res/file/48446235928.pdfIn PDF document text
    • http://francescasciortino.it/userfiles/files/18127075527.pdfIn PDF document text
    • http://www.cerathai.com/image/upload/File/bujiderimemi.pdfIn PDF document text
    • http://yuseigachi.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16115d2c1b626d---sirunefokizole.pdfIn PDF document text
    • http://matchonusa.com/uploads/files/80884589765.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=draper+smith+applied+regression+analysis+pdfPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d700.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD700 17812 bytes
SHA-256: e225b7ce4ddac76d669758e875ed478b02e46f355e26f339a8a048519fe518f0

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