Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b2d911d8be769b9…

MALICIOUS

PDF

84.0 KB Created: 2021-08-14 19:36:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 77e191094725fd11ab7b98f899b01a6b SHA-1: cc72ccc1c8d37a7925c748b1d677c7d3e1948136 SHA-256: 9b2d911d8be769b9a887a2399772b7c7bbc63c02726f1bdd54f1915dd40c0742
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users. ClamAV and ML classifiers identified this PDF as malicious, specifically flagging it as a phishing trojan. The presence of external URIs and link farms indicates an attempt to lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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 http://americansemitruckparts.com/d/files/21760414834.pdf In PDF document text
    • https://pensionatiitalianiinportogallo.it/wp-content/plugins/super-forms/uploads/php/files/c8ec72e349b08c49289626007c8c8070/duvaminaduraxizoribavoke.pdfIn PDF document text
    • http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/1606c7d739caad---35868252806.pdfIn PDF document text
    • http://irvinenott.co.uk/ckfinder/userfiles/files/98186323382.pdfIn PDF document text
    • https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c87bd9bfe0---lisixusaniborepe.pdfIn PDF document text
    • http://www.ks-klinika.ru/ckfinder/userfiles/files/56605674734.pdfIn PDF document text
    • http://kokocurry.gm/userfiles/file/52659808596.pdfIn PDF document text
    • https://www.bouwenaaneensterkwerkgeversmerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16074966c8d885---14499756120.pdfIn PDF document text
    • https://fiambreszav.com/wp-content/plugins/super-forms/uploads/php/files/f4cc2e9e3a41044c036c3f2218679f97/magaxo.pdfIn PDF document text
    • https://kachhiproperties.com/wp-content/plugins/super-forms/uploads/php/files/gciu1ae7rmkul62rom2btc5sg1/26323542414.pdfIn PDF document text
    • http://westmoorclassof1965.com/clients/5/52/52ec68f2b927accf75267cb07bfcc891/File/rakap.pdfIn PDF document text
    • https://nisahanpin.com/calisma2/files/uploads/jadejunes.pdfIn PDF document text
    • https://franchiseharbor.com/files/files/wodobonipafarapexepigas.pdfIn PDF document text
    • https://2acontractor.it/images/file/kajife.pdfIn PDF document text
    • https://balance-global.com/wp-content/plugins/super-forms/uploads/php/files/b10i3j487dq94sds4u537gunrl/24573130501.pdfIn PDF document text
    • http://sungsam.net/userData/board/file/segexipiximivezenadukel.pdfIn PDF document text
    • http://tecresconsolidamentorestauro.it/fck_data/file/vedax.pdfIn PDF document text
    • https://cowichanmusicfestival.com/userfiles/file/49396784815.pdfIn PDF document text
    • https://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607976bd4187c---70848044933.pdfIn PDF document text
    • https://mangonebike.com/uploads/file/63970478427.pdfIn PDF document text
    • https://rintrans.com/files/69742664088.pdfIn PDF document text
    • http://goref.ru/files/file/boxefuberav.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=cat%C3%A1logo+truper+2020+pdf+descargar+gratisPDF 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

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_off0000dee7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEE7 18420 bytes
SHA-256: 877cab249e5aad237580a0943385988f5d765cd6f18120380a49dd7665fe40b1
font_01_sfnt_off00010e47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E47 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001265e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1265E 11244 bytes
SHA-256: 8ce18dad1e726458ffd8579bd949fa9d45bca2df07317cdc7c4977f33f04afab

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