Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5a1cc96ea6d8970…

MALICIOUS

PDF

89.6 KB Created: 2021-06-28 04:46:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: bef489c4ae1aadca4784afe464d8555b SHA-1: 4ef2975e4c010de794c2e0d4ec3af00b2efe896b SHA-256: b5a1cc96ea6d89705bd57ae686e7458bacde7c515686934d857a43ee93b1cd58
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links, many pointing to compromised WordPress sites and disposable hosting, suggesting a link farm used for phishing or malware distribution. The presence of embedded URLs and the nature of the heuristics strongly suggest this document is designed to redirect users to malicious content, likely involving JavaScript execution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 7

  • 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
  • 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://vntdc.com/upload/fck/file/mugufuwon.pdf
    • https://hopefor.today/wp-content/plugins/super-forms/uploads/php/files/49116b86d83429df2da8f1076687eb2d/82766323629.pdf
    • http://himalayanwanderer.com/himalayan/userfiles/files/63955420118.pdf
    • https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ceced133e6d---levugajot.pdf
    • http://iwish-cosmetics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608235451982c---54813794632.pdf
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d4b37c403e---17923060611.pdf
    • https://www.northernillumination.com/wp-content/plugins/super-forms/uploads/php/files/74c378e446df849cd55b01af6bac45ca/legolunarovodot.pdf
    • http://ekolojikweb.net/upld/userfiles/file/xudiguz.pdf
    • https://www.napariverinn.com/wp-content/plugins/super-forms/uploads/php/files/520ca2a47b812acbae14fe5ef3dc0490/72069230296.pdf
    • https://0900107678.com/upload/file/57048882219.pdf
    • http://targhevaticane.it/userfiles/files/gebesewuwemupesuzefaluwo.pdf
    • https://www.djluk.co.uk/wp-content/plugins/super-forms/uploads/php/files/c3otht4516ct7rji8dg3nsdbkj/58749233097.pdf
    • https://roweryelectra.eu/app/webroot/uploads/file/16211707702393.pdf
    • http://halaljones.com/uploads/files/sanekikegadoxoruwede.pdf
    • https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095ff1d280d2---32655348989.pdf
    • https://canvasations.com/wp-content/plugins/super-forms/uploads/php/files/4fqpev0farep9tc3ti34c0np81/41563704210.pdf
    • http://parkhighclassof60.com/clients/871169/File/gosiladejivevon.pdf
    • http://domholidays.com/userfiles/file/97701797355.pdf
    • http://grandchainfamilyfoundation.com/clients/85333/File/jufawovipunezasolub.pdf
    • https://makemycake.gr/wp-content/plugins/super-forms/uploads/php/files/1l8dmi00bcs4ao6c6v1fpun501/96153054804.pdf
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/14r3gdt3c3de4ntpb9jc3c89v5/xorokasitoxit.pdf
    • https://advancedbusiness.co/wp-content/plugins/super-forms/uploads/php/files/b41a26aab1cbb33b4aacc2a37c2cb631/jufilibitezopigetakosusap.pdf
    • http://manpukuorder.com/uploads/files/61499118784.pdf
    • https://rclurie.com/wp-content/plugins/super-forms/uploads/php/files/18a77e6c5262ef90c45323571f4b2d14/77680908730.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=recover+data+from+dead+screen+phone
    • https://sharpspringwww.kinsta.cloud/wp-content/plugins/super-forms/uploads/php/files/c2b3f00df66d96f8a8b4589f615940ac/wikapuwegiloxisop.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://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_off0000fb90.bin
dbe5a268c9251c2677a2a6eac032a783bf3630eeed05f3d26a9c915e7e64701f
pdf-font-stream PDF embedded font (sfnt) at offset 0xFB90 17096 bytes
font_01_sfnt_off00012807.bin
0abd1780d7d69556651d0ab46b6d9aaa8b0956ad8fb3f918a1cce01dc0083de8
pdf-font-stream PDF embedded font (sfnt) at offset 0x12807 10856 bytes
font_02_sfnt_off000140f7.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x140F7 16792 bytes