Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab17ce42b57d0559…

MALICIOUS

PDF

82.8 KB Created: 2021-09-06 21:01:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 31847066586140136f9791690d7e1f62 SHA-1: 2d341ae02400d37ad781b1c8f6bc5c15674e3077 SHA-256: ab17ce42b57d05593b44c6bd1b385d8abc43441ec7ea7c6d2c2d48f1217e8f4b
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link farm pointing to multiple compromised websites, likely intended to trick the user into downloading a malicious file. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic indicates the document may provide instructions to decrypt a password-protected archive, a common tactic to bypass gateway security. No scripts were extracted, but the presence of multiple external links and the ML classifier's high confidence suggest a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/c968605e361cc9787f76cc1a5533bac6/59242970271.pdf In PDF document text
    • http://sudeoksa.com/userfiles/file/20210906135625.pdfIn PDF document text
    • http://alnadaoil.com/userfiles/file/posugetil.pdfIn PDF document text
    • http://st-johnson.com/Uploadfiles/files/ralugibujug.pdfIn PDF document text
    • https://jiptv.nl/wp-content/plugins/super-forms/uploads/php/files/fqf966tmufcbqv8q6vk0qoar11/lixotelijozepedefixuvop.pdfIn PDF document text
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/9a14671843c556cb1cd1cc6628720c96/30893441758.pdfIn PDF document text
    • https://hosvagyok.hu/userfiles/file/molanokej.pdfIn PDF document text
    • https://umartravel.com/files/59748376676.pdfIn PDF document text
    • http://rethabise.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160c49ea3b1074---vovodekaf.pdfIn PDF document text
    • https://iqmuseum.mn/uploads/files/50160714549.pdfIn PDF document text
    • https://binarbaidfabrication.com/public_html/userfiles/file/xosasulufudunizogatadelag.pdfIn PDF document text
    • https://www.displaysdirectaustralia.com.au/application/third_party/ckfinder/userfiles/files/73247893311.pdfIn PDF document text
    • https://parisautotravel.com/wp-content/plugins/super-forms/uploads/php/files/24eb44cb5n66chogk6v6eaf856/kemememigasetabewu.pdfIn PDF document text
    • https://adepotcustom.com/UploadFiles/file/20210428200242158.pdfIn PDF document text
    • http://prospekt-rostov.ru/ckfinder/userfiles/files/pikumolu.pdfIn PDF document text
    • http://nenorm.com/files/files/fidevexo.pdfIn PDF document text
    • http://cricalliance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ccf47ce8ec---burarirope.pdfIn PDF document text
    • https://srinivasagroup.com/ci/userfiles/files/96304256458.pdfIn PDF document text
    • https://primewestelectrical.com/wp-content/plugins/super-forms/uploads/php/files/579d390b6429cbb73c651545769eca61/23616276316.pdfIn PDF document text
    • https://www.frankreich-ferien.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1609d21a4c5a9b---77386557175.pdfIn PDF document text
    • https://ingatlansos.hu/images/userfiles/file/demerabedusixip.pdfIn PDF document text
    • http://katheran.com/clients/55933/File/xagalidukuzosuwumuluroga.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=cara+mengkonversi+word+ke+pdf+onlinePDF 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_off0000dda7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDA7 17732 bytes
SHA-256: 2c3e7b21a13d8fd3a18ecb57b57af384b1883cd5183c0f13cebf792b45aa8713
font_01_sfnt_off00010bee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BEE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012405.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12405 11016 bytes
SHA-256: 33bad0dfc935da5785a6c056bd30a12746b572dabbdb0046dd7ca7bd1a511ef6

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