Malicious PDF — malware analysis report

Static analysis result for SHA-256 907b56932346a9e0…

MALICIOUS

PDF

77.1 KB Created: 2021-06-25 12:12:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: e0e7c2672225336ad41c82b669def0d4 SHA-1: 61914983b747d371290f924bea93d247152f597e SHA-256: 907b56932346a9e03a1053720eb97274c807b5d347a1f3315a432b48041749f2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple URLs hosted on compromised WordPress sites. These links are likely designed to facilitate phishing attacks or distribute further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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 https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/b8e52210abf528a26499c6f8978feda0/51037241127.pdf In PDF document text
    • https://www.edutechusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cac6be59ef1---40480324185.pdfIn PDF document text
    • http://omni-links.com/images/blog//file/wowasosanejafuxotiwab.pdfIn PDF document text
    • http://edu-family72.ru/content/images/uploads/file/75853797206.pdfIn PDF document text
    • http://agataklimowska.pl/userfiles/file/jebawob.pdfIn PDF document text
    • https://www.travelticket.com.au/wp-content/plugins/super-forms/uploads/php/files/q4shmcapeabqjv9pqh8j4f0ql6/5014745277.pdfIn PDF document text
    • http://artospace.com/pics/file/danufuzofisaludow.pdfIn PDF document text
    • https://akvaguru.hu/user/file/37906735984.pdfIn PDF document text
    • http://cs-golfclub.com/ckupload/files/10912617882.pdfIn PDF document text
    • https://www.davidcosz.de/wp-content/plugins/super-forms/uploads/php/files/gndr2tnvdhobe042nn4lue1v7i/18500312778.pdfIn PDF document text
    • https://www.mysmilestudios.com/wp-content/plugins/super-forms/uploads/php/files/dd3d75ba02419f0ac3c3b9a2c5272ed7/33629468923.pdfIn PDF document text
    • https://suemsas.com/wp-content/plugins/super-forms/uploads/php/files/ac8lda1sli7mj8dsgd5qhsp0s3/78200886635.pdfIn PDF document text
    • https://www.truegridpaver.com/wp-content/plugins/super-forms/uploads/php/files/8048e151672fe80cb4e78391e0aed2e7/bumavigofos.pdfIn PDF document text
    • http://carszana.com/image/upload/File/90497040469.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=as478+spec+pdfPDF 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_off0000c96b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC96B 18028 bytes
SHA-256: 69a88ca3582fc7c85611a488ba5d8327b136368cac02a50c45656528cd875594
font_01_sfnt_off0000f91a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF91A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011131.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11131 10208 bytes
SHA-256: 425a922e749c9973a469d933d20d20f26dc092e15a4fa2087c40f33b93889880

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