Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ac9c8f4c10a2753…

MALICIOUS

PDF

102.5 KB Created: 2021-06-12 22:07:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 02cc21ae34beba08301d89d5488676d2 SHA-1: be4bc7e1054249000b13ac1f336d7a6a112dc4e8 SHA-256: 9ac9c8f4c10a2753dd875dd48c6a78d6031180991286bbff0e17ccbea3cc3a5e
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains numerous links to compromised websites, indicating a phishing or malware distribution attempt. The presence of a 'download button' heuristic further supports a lure-based attack. Although no scripts were explicitly extracted, the ClamAV detection and ML classifier strongly suggest malicious intent, likely involving exploitation of PDF vulnerabilities to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://philabc.ru/uplcv?utm_term=raja+ki+aayegi+baraat+movie+download+720p PDF link annotation
    • http://huntland.hu/upload/file/waxasusi.pdfIn PDF document text
    • http://geology.ie/wp-content/plugins/formcraft/file-upload/server/content/files/1607a46a3d0466---xasutobazesibita.pdfIn PDF document text
    • https://lashmakerpro.it/wp-content/plugins/super-forms/uploads/php/files/90k4aed6ka9abu6iau162sttv6/zutigosupidamajoxikoki.pdfIn PDF document text
    • https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/1609ccb5d132de---50479703664.pdfIn PDF document text
    • http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/160a5bfcb242da---10256484842.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/18ur2fa5lucln7cbedu1cb0riu/85055373615.pdfIn PDF document text
    • http://americanpetrochemicals.com/customers/CMS-IMAGES/file/larunixetavupubuwivaxaji.pdfIn PDF document text
    • http://phuwangnam.com/user_file/file/12631484837.pdfIn PDF document text
    • https://jjmassociates.com/wp-content/plugins/super-forms/uploads/php/files/c02ce9701a030af7b54cfe63f81901e4/pabakapafoze.pdfIn PDF document text
    • https://realestateconnect.us/wp-content/plugins/super-forms/uploads/php/files/5vtdpmbasg21ve2b0uir4m4d91/xalaxuposalabijisorezow.pdfIn PDF document text
    • http://chocolatycakes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160826c6bef67f---diwiji.pdfIn PDF document text
    • http://acetuitioncentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607c80b4d7c70---46359071238.pdfIn PDF document text
    • https://www.swx.global/wp-content/plugins/super-forms/uploads/php/files/8fd256009e1f97e0f5f1d58c3a369c33/40477252268.pdfIn PDF document text
    • http://alituncer.com/userfiles/file/temuborufimubip.pdfIn PDF document text
    • http://newo.ru/files/files/90167474850.pdfIn PDF document text
    • https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/1608f806bb5018---85198478521.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000145d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x145D5 3076 bytes
SHA-256: 493774d46a2898af3b76471a160eb3616c2c80f89b50dc2cf7b5e5e294c20a02
font_01_sfnt_off000150d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x150D1 5996 bytes
SHA-256: 27302f7dcbbacad40d592b52e2cf2ad5d10f1d700e0372f595c4709b0f73a156
font_02_sfnt_off00016557.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16557 11488 bytes
SHA-256: 8139613d36fd30f03b69cb13682f03e61eee3672b1adb5562ff00b16f4f69492

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