Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e2e8402517f36e7…

MALICIOUS

PDF

85.2 KB Created: 2021-07-16 02:12:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 206576352c359eb9223301314178e8e8 SHA-1: ddecbc7ff94b70ae55cbd38af99a8b0be6b5b5c6 SHA-256: 5e2e8402517f36e7c8f36f269692f8fc5750716612f8acd84fa9dd9ce06aa5ed
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics and a machine learning classifier, with ClamAV detecting it as a phishing trojan. The file functions as a link farm, containing numerous URLs that point to various websites, including those hosted on compromised CMS platforms. The primary attack pattern observed is the distribution of malicious links, likely intended to lead users to phishing sites or further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://cepsagibyachtfuels.com/images/photos/74109418934.pdf In PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16096858739c4f---70641677848.pdfIn PDF document text
    • https://ceccargiurgiu.ro/userfiles/file/jaledoxatosato.pdfIn PDF document text
    • https://lawyerupsmart.com/tempimg/file/robuka.pdfIn PDF document text
    • http://maychamsocda.vn/images/userfiles/file/57490633847.pdfIn PDF document text
    • http://asesorgubernamental.com/images/file/xumekolun.pdfIn PDF document text
    • http://parkwaywest1974.com/clients/861606/File/26556365488.pdfIn PDF document text
    • http://www.apsetedavisi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a45061208a---pemojexosinumemo.pdfIn PDF document text
    • http://highlandhighclassof1962.com/clients/c/c3/c330a44b04b080977bf299ea430a317d/File/zepemiw.pdfIn PDF document text
    • http://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/16084d987c9c67---95035079280.pdfIn PDF document text
    • https://landlorddebtadvisory.com/wp-content/plugins/super-forms/uploads/php/files/cqni2onitrhqbm3rrfauma5316/ximutobiroruzurunaz.pdfIn PDF document text
    • https://www.costaverde.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609adf0d65fd8---sadakiduxiwevatid.pdfIn PDF document text
    • http://www.ddd-iasi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160c016e9b0d70---39499882536.pdfIn PDF document text
    • https://hasekei.jp/userfiles/file/vejigixepupugiw.pdfIn PDF document text
    • https://www.hdcorp.com.br/wp-content/plugins/super-forms/uploads/php/files/th4f06odvf8kdkuruvr8kpd2ic/82960129552.pdfIn PDF document text
    • http://styropapex.pl/userfiles/file/95095257354.pdfIn PDF document text
    • http://jullien38.com/ressource/site-image/files/najozezulovopuv.pdfIn PDF document text
    • https://businesslife.com/content/file/xajafodumi.pdfIn PDF document text
    • http://lbs.ac.at/wp-content/plugins/super-forms/uploads/php/files/lmbgnicmuede17128lu7rvgkad/56200942389.pdfIn PDF document text
    • https://fcr-fomentoconsumoerenda.com/uploads/files/1058831548.pdfIn PDF document text
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0d863df566---peluxadetibozorugelox.pdfIn PDF document text
    • https://popa.com.br/wp-content/plugins/super-forms/uploads/php/files/18d7cc0a4601194e45289bd5f690be8a/69613953753.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=sql+server+check+if+database+existsPDF 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e5f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5F2 10968 bytes
SHA-256: 40e5ef52fb5c0f80beb5e493c44f40d87346b3dc4d5282b7e1b00bfa2742cf7b
font_01_sfnt_off0000ff60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF60 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011772.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11772 18208 bytes
SHA-256: 278af9590811c1648932cf6cf8422ed27c1244116329d05b495a1af8eaf7bf14

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