Malicious PDF — malware analysis report

Static analysis result for SHA-256 80d7c398037c9b72…

MALICIOUS

PDF

78.0 KB Created: 2021-09-17 20:36:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 0f215ee7d0dec1d2ce223551693fb932 SHA-1: 2d6823e4638d8232dd1258e675abf7f5621f40e4 SHA-256: 80d7c398037c9b72f4994cd9dc66448a02ec844369ef4984c5e3f7f363ed64e4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The document contains a large number of embedded URLs, many pointing to compromised WordPress sites or disposable hosting, suggesting a phishing or malware distribution campaign. No scripts were extracted, but the presence of numerous external links indicates an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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 https://pixomot.ru/uplcv?utm_term=how+to+manage+my+phone+storage PDF link annotation
    • https://biographiewerkstatt-singer.de/userfiles/file/jiniweboguga.pdfIn PDF document text
    • http://seoulmenu.com/uploads/files/wajugikobup.pdfIn PDF document text
    • https://christembassyromford.org/wp-content/plugins/super-forms/uploads/php/files/42b2102b496ffe770d8b3d4425fe0b43/93537252149.pdfIn PDF document text
    • http://tavaszitura.eu/userfiles/files/94759603555.pdfIn PDF document text
    • http://greatnice.club/updatefiles/file/20002023624.pdfIn PDF document text
    • http://luckyassessoria.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/161382895214ff---24430754017.pdfIn PDF document text
    • https://retrofitoman.com/ckfinder/userfiles/files/xuvubo.pdfIn PDF document text
    • http://cicm2015.mist.ac.bd/app/webroot/ckfinder/userfiles/files/wakawosonelejali.pdfIn PDF document text
    • http://centonze-vini.com/userfiles/files/xegegolamakujasew.pdfIn PDF document text
    • http://www.yeosung21.or.kr/ckfinder/userfiles/files/1631523754.pdfIn PDF document text
    • http://iknow.pl/files/file/gumexolo.pdfIn PDF document text
    • https://suacuasathcm.com/uploads/files/mutizazeguzaxasavuk.pdfIn PDF document text
    • https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/16144aa58d3c20---61905999807.pdfIn PDF document text
    • http://onlytech-tunisie.com/userfiles/file/vunizu.pdfIn PDF document text
    • https://datatech-int.com/userfiles/file/tifiwosutaluj.pdfIn PDF document text
    • http://huh.hu/UserFiles/File/98037910103.pdfIn PDF document text
    • https://wisserarm.nl/app/webroot/files/userfiles/files/kuruzoxefaxepedewoxaboma.pdfIn PDF document text
    • https://driftwoodcc.com/userfiles/files/60905340553.pdfIn PDF document text
    • http://epmresearch.org/userfiles/files/4204513145.pdfIn PDF document text
    • http://edins.net/userData/ebizro_board/file/46891076724.pdfIn PDF document text
    • http://aguito.madteam.net/ckfinder/userfiles/files/47223890235.pdfIn PDF document text
    • https://osakadentalcare.com/contents/files/gatafirizapisijij.pdfIn PDF document text
    • http://ipllaser.in/uploads/bugotoji.pdfIn PDF document text
    • https://certifiedmoversinc.com/wp-content/plugins/super-forms/uploads/php/files/9ca4e499a4803a950159c5ce95b39606/19561353499.pdfIn PDF document text
    • https://eventpro-kontraktorpameran.com/uploaded/files/58005571341.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ce1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE1C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e62e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE62E 16828 bytes
SHA-256: 7f205a99bca65ba4649f8ba98de5e893198f99c9ac0ea1bb5e90a8221afff392
font_02_sfnt_off00011177.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11177 10752 bytes
SHA-256: afff433f95c15d6c8bf492383263e6693ad6315b3c08bc160ee4c4b22879fe65

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