Malicious PDF — malware analysis report

Static analysis result for SHA-256 35832e103e765836…

MALICIOUS

PDF

81.7 KB Created: 2021-08-06 10:03:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 1f72aded0496de89f13f12c83acd6321 SHA-1: 2f158a2809e5f9deb1bf440a6a209f5a9d4f914f SHA-256: 35832e103e765836f1953711e9d9edc6cd377ef059313d5fb22b2869f3010203
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery through these external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://coretry.ru/uplcv?utm_term=genetic+crosses+that+involve+2+traits PDF link annotation
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/160cbbf5456911---jaziperodojuvet.pdfIn PDF document text
    • http://heninrealty.com/userfiles/files/lumotodofakonujofenanura.pdfIn PDF document text
    • http://iehyun.com/editorupload/file/68818165017.pdfIn PDF document text
    • http://benthanhfarm.com/images/uploads/files/55771088420.pdfIn PDF document text
    • https://biovuspharma.net/userfiles/files/36171925212.pdfIn PDF document text
    • http://1959blackshirts.com/clients/866684/File/73269819389.pdfIn PDF document text
    • http://bafiti.com/sklep/userfiles/file/novim.pdfIn PDF document text
    • https://cowichanseniors.ca/userfiles/file/senibamevokit.pdfIn PDF document text
    • https://sip7.pl/autoinstalator/sip7.online/wp-content/plugins/super-forms/uploads/php/files/6d72dd6c1667a7e9d1771d616301ff04/42555528321.pdfIn PDF document text
    • https://myhoorayhealth.com/wp-content/plugins/super-forms/uploads/php/files/fajfm9m2ddv9l836fh34634h36/27390379103.pdfIn PDF document text
    • http://altaprecision.com/userfiles/file/63013659792.pdfIn PDF document text
    • http://caphegiabao.com/upload/fck/file/nuxamin.pdfIn PDF document text
    • http://anhbanglaw.com/userfiles/file/fenigoxafokixap.pdfIn PDF document text
    • http://aaaexpressheating.com/userfiles/file/46868472732.pdfIn PDF document text
    • https://media-get.com/userfiles/files/34433948577.pdfIn PDF document text
    • http://global-insurance-broker.de/downloads/40601062242.pdfIn PDF document text
    • http://larrysiegellaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/larar.pdfIn PDF document text
    • http://agcslohian.com/userfiles/file/3514809634.pdfIn PDF document text
    • http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb8aede8cf---76474755737.pdfIn PDF document text
    • https://vidolamerica.org/wp-content/plugins/super-forms/uploads/php/files/e70456d39b90ad00a17988f3263ef2e5/sutovudikukolepuvemikukoz.pdfIn PDF document text
    • http://xn--e1aazeoc7d.xn--p1ai/images/shared/file/13931338876.pdfIn PDF document text
    • http://svx.su/ffile/file/98481980099.pdfIn PDF document text
    • http://uleshuzatshop.hu/files/file/duzazipivigutuxobum.pdfIn PDF document text
    • http://accessibilite-salle-eau.com/ckfinder/userfiles/files/sofefebiwakijopipa.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_off0000daed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAED 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f2ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2FF 17096 bytes
SHA-256: 4f249a12be23caf312e9078ddc1baf193c3ed7dbf7fe5a60f927702cf2e57828
font_02_sfnt_off00011f65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F65 10552 bytes
SHA-256: 67c51af12c5016a65676b18217ca018dfcde5c65610cbc024180e54a59c409a7

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