Malicious PDF — malware analysis report

Static analysis result for SHA-256 e662a483e942e650…

MALICIOUS

PDF

113.3 KB Created: 2021-09-02 21:09:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 9ab157d3a91df652982f01f02378445b SHA-1: 47afe21182e0396dee3ae4eeeca08bbc086e1b44 SHA-256: e662a483e942e650aba6d74dffc6f8e3c9644c7e5bea68ffc70217e31f812fc5
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to numerous URLs, many hosted on compromised WordPress sites, indicating a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly suggest malicious intent, likely to lure users to malicious content or downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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://bhhangkhong.com/upload/images/files/89877983301.pdf In PDF document text
    • https://jdbailbonds.com/wp-content/plugins/super-forms/uploads/php/files/377e7e1300117dcc6fceec57c5167d22/31148899251.pdfIn PDF document text
    • https://tenekedjieva.com/uploads/file/rerifad.pdfIn PDF document text
    • http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610108c748abe---52040395612.pdfIn PDF document text
    • https://ecoretras.com/file/zegezedovajogovoximip.pdfIn PDF document text
    • https://betonwerkendejonge.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609c6c1465895---41508083146.pdfIn PDF document text
    • https://www.lokalesichtbarkeit.de/wp-content/plugins/super-forms/uploads/php/files/rju1alv08nrdacnn7n2cb9hsvn/negepoxurilo.pdfIn PDF document text
    • https://ercrs.org/wp-content/plugins/super-forms/uploads/php/files/1hedasorolijtgs4ppaio4i4jt/wopijodukamepiwuto.pdfIn PDF document text
    • http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610dc4a7e8f80---vozobafebowulax.pdfIn PDF document text
    • http://01host.ru/userfiles/files/xozif.pdfIn PDF document text
    • https://imagebuzz.net/ckfinder/userfiles/files/nikexas.pdfIn PDF document text
    • http://moriefrusca.com/userfiles/files/43446344691.pdfIn PDF document text
    • https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/16086568181eb5---45520322586.pdfIn PDF document text
    • http://showpelec.com/data/file/20210815_174251_470.pdfIn PDF document text
    • https://banderlogclub.ru/Files/file/livomalat.pdfIn PDF document text
    • http://jtg-antracyt.pl/files/file/54314230749.pdfIn PDF document text
    • http://labotinnghia.com/img/files/xijivopobinidiwajilev.pdfIn PDF document text
    • https://ontime-taxi.kg/wp-content/plugins/super-forms/uploads/php/files/73e78688cfaee291401ce86d09a9110f/guxulugo.pdfIn PDF document text
    • https://www.creativetalentnetwork.com/ckfinder/userfiles/files/70672610755.pdfIn PDF document text
    • https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161212af99add4---60823330350.pdfIn PDF document text
    • https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/1611bcd683ce2a---835717047.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=mazda+cx+5+navigation+system+manualPDF 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_off00014e02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14E02 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00016614.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16614 21244 bytes
SHA-256: ffa6b201dab81a4d7810782ac5d5d9afcf048b0e31d27e96a8fac634164fd7f5
font_02_sfnt_off00019d61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19D61 11180 bytes
SHA-256: a8108a3a7fae94db892da7990c01136ef1418463b04280ee7791d47ccc3fe8b5

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