Malicious PDF — malware analysis report

Static analysis result for SHA-256 67ef9e4ab0cca8de…

MALICIOUS

PDF

105.1 KB Created: 2021-06-25 16:44:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: 052462b9e00d8f03c85fffd5df770700 SHA-1: e3be70e7d36611431217eb7adf586ccc81745358 SHA-256: 67ef9e4ab0cca8de1776057b49763551b9b8e87959c170b42e5c5ae153909c57
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised websites, suggesting a phishing or malware distribution scheme. The presence of multiple links on disposable hosting and within form upload directories further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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
  • 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 http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad1d52d0dd5---ratego.pdf In PDF document text
    • http://asbu.net/uploads/FCK_files/file/nexixadoninur.pdfIn PDF document text
    • http://mko-yug.ru/wp-content/plugins/super-forms/uploads/php/files/3229643d0300c69de50451806551c6b2/jefilisitubeditev.pdfIn PDF document text
    • https://patriot.ch/wp-content/plugins/super-forms/uploads/php/files/biipfqs769c7riov8ughmhmb0n/32107293484.pdfIn PDF document text
    • https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081d04a4f9a2---40332706344.pdfIn PDF document text
    • http://steelbo.com/uploads/admins/u0/files/20210531101532.pdfIn PDF document text
    • http://abc-tel.ru/data/File/66464564881.pdfIn PDF document text
    • https://www.die-umzugsfabrik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba9bcb3938c---36981752900.pdfIn PDF document text
    • http://navigator-nsk.ru/userfiles/file/vuwugovupaza.pdfIn PDF document text
    • http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607793c438a20---badinowexasematunegen.pdfIn PDF document text
    • https://bamfieldrental.com/userfiles/file/rasotujuredow.pdfIn PDF document text
    • http://hkalc.com/userfiles/dadurukalinibowubikebu.pdfIn PDF document text
    • https://duext.com/wp-content/plugins/super-forms/uploads/php/files/ebf8e863671be07276ed04589b9a8e36/4502524585.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=cubital+tunnel+syndrome+therapyPDF link annotation
    • 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000138bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x138BB 11040 bytes
SHA-256: 22b2785f34cb74aa54df167aebd0856623d13a5a7535d6d591f99727b3ed9db2
font_01_sfnt_off0001520d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1520D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00016a1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16A1F 17564 bytes
SHA-256: d9de4b37aa42f6fd11b10b06f72a6683a1575c53d801ec7f2f3488cf6e1187dd

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