Malicious PDF — malware analysis report

Static analysis result for SHA-256 db9b0ce6a60831af…

MALICIOUS

PDF

96.3 KB Created: 2021-09-06 01:23:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 620eaf6383fc5eb3a1923583c4a4ceb8 SHA-1: 3d8ee6c4ec91cfd37818873f96d8cfa835bafff8 SHA-256: db9b0ce6a60831afbdc62c132f2cfc400a85d5e82910cd54b14145a0dea38ef4
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as a malicious PDF by ClamAV and ML classifiers, exhibiting characteristics of a phishing lure. It contains a link farm pointing to various domains, some of which appear to be compromised CMS uploads or hosted on disposable infrastructure, suggesting an attempt to distribute further malicious content. The presence of external URIs and a link farm indicates a phishing or social engineering attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://philipwillettelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/98162170759.pdf In PDF document text
    • http://fouladsazanco.com/Upload/file/jupetowovarazuridu.pdfIn PDF document text
    • https://theemperorsoldclothes.co.uk/wp-content/plugins/super-forms/uploads/php/files/44rmase4bbuhakmtv1lp3rsdr6/5372774850.pdfIn PDF document text
    • http://178.62.148.222:300/ckeditor/ckfinder/userfiles/files/66790698300.pdfPDF link annotation
    • http://multiseal.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/160a5768f0a1f8---89380942862.pdfIn PDF document text
    • https://eminencesolutions.in/resources/userfiles/file/gixisovumekofimixegevavus.pdfIn PDF document text
    • https://amesmedicalservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610474a9f2ebf---70327446143.pdfIn PDF document text
    • https://conviviodihera.it/dati/upload/file/zibejedakow.pdfIn PDF document text
    • http://hillcrestneighborhoods.com/userimages/xefematiwifuki.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/1fccf13ec47adcc5fa559462309d53b4/pibelotiwitig.pdfIn PDF document text
    • https://at-studio.tw/app/webroot/userfiles/files/20210724_193807.pdfIn PDF document text
    • http://moveworldtogether.com/datas/files/jefowitarekomalatirakig.pdfIn PDF document text
    • https://abandassociates.com/ckfinder/userfiles/files/30472597338.pdfIn PDF document text
    • https://www.hdontheroadnapoli.it/wp-content/plugins/formcraft/file-upload/server/content/files/160bc1450177ac---padego.pdfIn PDF document text
    • https://bikinibody.be/wp-content/plugins/super-forms/uploads/php/files/2ikhr5de92moami3um7rd9ejgt/nuxufakimaluw.pdfIn PDF document text
    • https://www.chinacimctrailer.com/wp-content/plugins/super-forms/uploads/php/files/d1d37320c4200d795a574fd6e9fddea9/rusasopumigoxexosibin.pdfIn PDF document text
    • http://herodumpsterrental.com/wp-content/plugins/super-forms/uploads/php/files/cad259a76bbed2fb1c65c187d3f4a4b6/99155433632.pdfIn PDF document text
    • https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073592b45437---daluvatisunimadikuza.pdfIn PDF document text
    • https://www.ptlittleflower.org/wp-content/plugins/super-forms/uploads/php/files/goeblr0tifu1ong604e0eo72dn/81688615734.pdfIn PDF document text
    • http://impactpluslearning.com/ckfinder/userfiles/files/govujakaripij.pdfIn PDF document text
    • https://goldenparadisestsimons.com/wp-content/plugins/super-forms/uploads/php/files/1f6a1213279b9c1daf97e8edc9b6455a/gekikugusipenigogaren.pdfIn PDF document text
    • https://ta-taiwan.com/app/webroot/userfiles/files/xuguxogidedurarezefil.pdfIn PDF document text
    • https://securitydm.rs/slicice/file/runofesituxadatubadulatu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=ways+of+the+world+pdf+chapter+12PDF 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_off00011158.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11158 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001296f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1296F 10884 bytes
SHA-256: 3ed1862688eb1a13d813a8a31435aeeefa1ab3f19bbcc49968113a493982c46e
font_02_sfnt_off000142fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x142FC 18748 bytes
SHA-256: 662d010bdeaf6b2154ef966d39b13f7dadd196554cb7fb08d101764a21131a4d

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