Malicious PDF — malware analysis report

Static analysis result for SHA-256 06dbf6a345a428b1…

MALICIOUS

PDF

89.3 KB Created: 2021-07-03 10:01:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 9e25429c2456faf2719f1859e94906a1 SHA-1: 144626d4733c6ab21274d4632d7e117dc4924f55 SHA-256: 06dbf6a345a428b164fae8c54e50a7641c3e968390940ecd51c30a1fc8e9766c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many pointing to compromised WordPress sites, suggesting it's part of a phishing or malware distribution campaign. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the structure and URL patterns are consistent with a malicious PDF designed to lure users to external, potentially harmful, content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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://wastran.ru/uplcv?utm_term=pope+francis+stations+of+the+cross+2020 PDF link annotation
    • https://sharzh-ufa.ru/wp-content/plugins/super-forms/uploads/php/files/32e1f8fbb2955ed860d65381d71c00af/topapokejotaxobuwolix.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cbe5200f1fb---31301710114.pdfIn PDF document text
    • http://saamfactory.com/wp-content/plugins/super-forms/uploads/php/files/7e24699b7a32ef04a2ecd49c01925491/navepijogovopusufiruduku.pdfIn PDF document text
    • https://www.dynasil.com/wp-content/plugins/super-forms/uploads/php/files/3709d577009598434ef848a980195c6d/634707399.pdfIn PDF document text
    • https://fruzsiflame.hu/userfiles/file/bosopetolimak.pdfIn PDF document text
    • https://travels-ukraine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c127709ba9e---35367139713.pdfIn PDF document text
    • https://jdrum-music.com/uploads/ckfiles/files/sadevidemapej.pdfIn PDF document text
    • http://mirrorgallery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fbb8f563c8---27134629279.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095b337018dd---7335133848.pdfIn PDF document text
    • https://frontlinetherapist.com/wp-content/plugins/super-forms/uploads/php/files/0806b37cfe52c06748f0f0102a6645cd/gadizatudon.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/4f813eddae513e855f705c2c8d002173/wodiwikaranapolijetitusu.pdfIn PDF document text
    • https://babamore.com/upload/ckfinder_temp/files/20210614214557.pdfIn PDF document text
    • https://szallas-karpatalja.com/upload/62732691519.pdfIn PDF document text
    • http://ssaisarang.com/ckfinder/userfiles/files/nidikal.pdfIn PDF document text
    • http://andlupa.com/userfiles/file/rigetazagotimofawojala.pdfIn PDF document text
    • http://abacusnancy.com/userfiles/file/repabutatutigivij.pdfIn PDF document text
    • https://kildevangen.dk/files/gowowemezetizowopude.pdfIn PDF document text
    • http://digimaap.com/wp-content/plugins/super-forms/uploads/php/files/uv1qq8134bsejsinr3bjrncgvv/51714737273.pdfIn PDF document text
    • http://etkindenetim.com/resimler/files/daxob.pdfIn PDF document text
    • https://west-holding.com/userfiles/file/zudarififibefupo.pdfIn PDF document text
    • https://tuabogadoangel.com/wp-content/plugins/super-forms/uploads/php/files/3e275bf90a87b73f04a1b8b27aee03ee/44030740672.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f8ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8AD 10772 bytes
SHA-256: 10a507328386aaa1772244d1ae8a87143a5cd00827be54aec8fb274d6d57e6e3
font_01_sfnt_off0001117c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1117C 17928 bytes
SHA-256: 1a37765a4c723a2a5d1190a93028439319dc9dc9781233262e76b8a8fb016b4d
font_02_sfnt_off00013feb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13FEB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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