Malicious PDF — malware analysis report

Static analysis result for SHA-256 56db7912592a0654…

MALICIOUS

PDF

132.1 KB Created: 2021-06-29 10:41:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 6ee8d8d713b0bd518c298e645110ea11 SHA-1: d14843526c9968428b18b8e85b07d444c30c69db SHA-256: 56db7912592a06542ab04af5274a999285e94a998da225cf1b53b88d4fd80154
156 Risk Score

Malware Insights

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

This PDF was flagged by ClamAV as a phishing trojan and by an ML classifier, indicating malicious intent. It contains numerous links pointing to compromised websites, suggesting it's used to redirect users to malicious content. The presence of multiple PDF link farm heuristics further supports this, indicating a tactic to distribute or host malicious files.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9511

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://cuatro-pr.org/sites/default/files/file/24343287580.pdf In PDF document text
    • https://yastudio.net/wp-content/plugins/super-forms/uploads/php/files/5ae32c0edd571e4be46a0b548ed01871/wepenopegomovonifa.pdfIn PDF document text
    • https://areshin.ru/wp-content/plugins/super-forms/uploads/php/files/17e5be6a9f1530d82361fa73357bb326/37331298911.pdfIn PDF document text
    • http://moristas.com/userfiles/files/voluwaragagonuboru.pdfIn PDF document text
    • http://securitydirect.it/wp-content/plugins/super-forms/uploads/php/files/74fbf2dd3d431773cb0e6441aec94ba0/jogogodabo.pdfIn PDF document text
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e90c24cf63---bokunabemud.pdfIn PDF document text
    • http://barrarioservicos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a06d6773caa---53179699016.pdfIn PDF document text
    • http://chipublichouse.com/ckfinder/userfiles/files/13936239192.pdfIn PDF document text
    • https://gulertrafik.com/wp-content/plugins/super-forms/uploads/php/files/u6a1l8ack8bgd9e2tmdccaspuh/27246223898.pdfIn PDF document text
    • https://mecaniquekd.ca/upload/file/lenitujeve.pdfIn PDF document text
    • http://deauville.ru/files/file/92554657053.pdfIn PDF document text
    • https://esteticarcare.com/wp-content/plugins/super-forms/uploads/php/files/a4a936612d3fdd9d61c73879dd904976/7765594718.pdfIn PDF document text
    • https://itracmediav5.com/ckfinder/userfiles/files/jisap.pdfIn PDF document text
    • http://abacusnancy.com/userfiles/file/99803030129.pdfIn PDF document text
    • http://mbcasc.net/imgs/file/gijexenozoresadedu.pdfIn PDF document text
    • https://refour.dk/wp-content/plugins/super-forms/uploads/php/files/fdd72277523bb68a714a1849aba70175/nerafase.pdfIn PDF document text
    • https://tucsonhomewindowtint.com/wp-content/plugins/super-forms/uploads/php/files/fe6181522f26243cd82cdbee2bfc7e12/tuxewowar.pdfIn PDF document text
    • https://www.nobleorthodontic.com/wp-content/plugins/super-forms/uploads/php/files/60f178b7d8ddeaae850193556f407bcf/86992795288.pdfIn PDF document text
    • http://statewideroadservices.com/clients/879378/File/1163488350.pdfIn PDF document text
    • http://amandamaitland.com/images/file/70440357152.pdfIn PDF document text
    • https://www.lamuccacompany.com/wp-content/plugins/super-forms/uploads/php/files/ade01e07ed93a8c8c383858d94790d23/buwazarezutimebuj.pdfIn PDF document text
    • https://gaseg.com/wp-content/plugins/super-forms/uploads/php/files/4e7k28p60o9vnctjnqp4cbma9j/telukod.pdfIn PDF document text
    • http://sip7.online/wp-content/plugins/super-forms/uploads/php/files/cd7ed585e70c87f47d40926fa7f6d180/49344776540.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=c%23+unsigned+intPDF 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d0b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0B1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e8bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8BF 73568 bytes
SHA-256: be60a79ac74c35183712ec0d8c94249987887f5b38d1a684e0945e37fe8b3016
font_02_sfnt_off0001a8e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A8E9 16456 bytes
SHA-256: b567351d8817b452d7c2fb9a0144519bfd530866bceb2805c1f9ef2299257e42
font_03_sfnt_off0001bf3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BF3B 17976 bytes
SHA-256: 847779f358e89069deb70875a6c6fe52bfb228aa3ad67da208a6292c2491af34
font_04_sfnt_off0001edc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1EDC3 9104 bytes
SHA-256: fe4a9ad32d6d12da45ce8861a1e6e511df5579fd33367a5c4d1c9e774d301804

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