Malicious PDF — malware analysis report

Static analysis result for SHA-256 4954d92385a508ef…

MALICIOUS

PDF

93.6 KB Created: 2021-06-27 18:43:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 91b82f43f1d16be00601eb1ba6e10b30 SHA-1: 8b56072201db7aead78b3b812304696d31bb4803 SHA-256: 4954d92385a508ef2912076a5465f802e19baed2faab431e235427dd9ef4680a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to various compromised WordPress sites, likely for phishing or malware distribution. The presence of external URIs and link farms on disposable hosting suggests an attempt to obscure the ultimate malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9918

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://synerhu.ru/uplcv?utm_term=retouch+photos+remove+unwanted+object+from+photo PDF link annotation
    • https://wills.sg/wp-content/plugins/super-forms/uploads/php/files/3211f4f8e44c45df35a4d161174df955/dejizer.pdfIn PDF document text
    • https://lightupalife.org.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607ca4551385a---bawilivabufotin.pdfIn PDF document text
    • http://socialbomjesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160948a3a9985f---vamurowugitugetajezeru.pdfIn PDF document text
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608579c18ba94---womiluwewezitofefomoneres.pdfIn PDF document text
    • http://wsp.pl/userfiles/file/25705410344.pdfIn PDF document text
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f7655a87e0---41218101958.pdfIn PDF document text
    • http://scissortailfarms.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e26766e1e6---togezumekobefivufi.pdfIn PDF document text
    • https://www.lokalesichtbarkeit.de/wp-content/plugins/super-forms/uploads/php/files/avbghnucjk67s7vrhnltojjkod/22364001576.pdfIn PDF document text
    • http://sevinctekstil.com/resimler/files/94913001426.pdfIn PDF document text
    • http://www.lugashotel.com/data/editorfile/durapifabegog.pdfIn PDF document text
    • http://youandisagenix.com/ckfinder/userfiles/files/48496107590.pdfIn PDF document text
    • http://kingcraftviet.com/uploads/ckfinder/files/dijosomili.pdfIn PDF document text
    • https://brokenspoke.com/wp-content/plugins/super-forms/uploads/php/files/d858a3061b9305c88ff2756493708ffe/bamumikamaziroguk.pdfIn PDF document text
    • http://lubrifianti-auto.ro/files/file/35210802486.pdfIn PDF document text
    • http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e2df571c9e---sinavi.pdfIn PDF document text
    • http://www.ambredore.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084e5783ee12---sutakexepiraxinuvarilukat.pdfIn PDF document text
    • http://amatnieks.com/pictures/image/42189250332.pdfIn PDF document text
    • http://www.homefacelifters.com/wp-content/plugins/super-forms/uploads/php/files/e8c7ab5af8814b06147d67c040d91043/77093126867.pdfIn PDF document text
    • https://fatheragneliti.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c5e4b66aa2---gofokedisejekizi.pdfIn PDF document text
    • https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6bf7f981a5---taxetozatoj.pdfIn PDF document text
    • http://www.biotanika.pl/upload/file/26103755902.pdfIn PDF document text
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ed369a40b8---basubi.pdfIn PDF document text
    • http://alt-1c.ru/userfiles/file/43610765801.pdfIn PDF document text
    • https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac16da75984---10330602275.pdfIn 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://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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f0e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0E4 16708 bytes
SHA-256: 5224cce6d528a646be165deb4c8171529534d93ee805d0e7f18fd262adf4bae5
font_01_sfnt_off00011c4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C4F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013466.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13466 11312 bytes
SHA-256: fb73f0987c03dee0050e07739e95d1dd2958db9d5faf9b2894b4330b21897b49
font_03_sfnt_off00014eb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14EB0 16716 bytes
SHA-256: 3cf980830fe2fafffd6df472680d49c013c5c6e5edf1349e77d67087b9f5256a

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