Malicious PDF — malware analysis report

Static analysis result for SHA-256 a707e6132eaee481…

MALICIOUS

PDF

80.5 KB Created: 2021-09-18 23:11:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 4e9248c569801a1644abf8497905def4 SHA-1: af0c49b61d70b1b1b8492a613dda39bdbd824041 SHA-256: a707e6132eaee481e9ab32ddfcb25522fe3fce0233c2e92a91b914abac7f0b2d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It functions as a link farm, containing numerous URLs that redirect to various websites, likely for phishing or malware distribution. The presence of external URI links and the overall structure suggest an attempt to lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://philabc.ru/uplcv?utm_term=poco+x3+nfc+benchmark PDF link annotation
    • https://comfort8889.com/upload/files/liloborejexesamovaxufi.pdfIn PDF document text
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134e2a6a6a88---sokozuworatutuket.pdfIn PDF document text
    • https://mwasafat.com/uploads/files/nikato.pdfIn PDF document text
    • http://pooq-design.com/app/webroot/fckfiles/file/60706792721.pdfIn PDF document text
    • http://utcsp.rustyramone.com/uploads/files/91805922476.pdfIn PDF document text
    • http://a9188.com/upload_files/art_files/files/20210908_070010.pdfIn PDF document text
    • http://pathtojanna.com/userfiles/files/51929992634.pdfIn PDF document text
    • https://sv-fin.ru/wp-content/plugins/super-forms/uploads/php/files/c02d54c64d8a89dd961d9705754c26bf/59353705563.pdfIn PDF document text
    • https://118highschool.am/wp-content/plugins/super-forms/uploads/php/files/fb5ec86db727ec230a24c59b02556e0a/36071088590.pdfIn PDF document text
    • https://himarco.ir/basefile/himarcoir/files/53245632262.pdfIn PDF document text
    • http://vejwun.cz/images/wopopixilebizawosupaku.pdfIn PDF document text
    • https://minhkygroup.com/luutru/files/witamofijutufukugesad.pdfIn PDF document text
    • https://istanbularicilikfestivali.com/upload/ckfinder/files/temuzigisimofolapi.pdfIn PDF document text
    • http://apothepharma.com/upload/files/dejegilinorejejam.pdfIn PDF document text
    • http://btfa.tw/upload/files/xidovopux.pdfIn PDF document text
    • https://maximaainfoways.com/WebExams/ckfinder/userfiles/images/files/96484957285.pdfIn PDF document text
    • https://www.helpfulhunks.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/161325c91034ed---57312766990.pdfIn PDF document text
    • https://sandp-engineering.com/ckfinder/userfiles/files/10290636355.pdfIn PDF document text
    • https://actsonics.com/uploads/files/202109062019107354.pdfIn PDF document text
    • https://landtop.com/filespath/files/20210904141754.pdfIn PDF document text
    • http://www.sloepverhuur-debiesbosch.nl/upload/files/vugenagafer.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

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b8ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB8EA 20868 bytes
SHA-256: 9a02d48e2e64feef2de15ed796872cf8e48b1a6afdc68329d083ad4efbde191b
font_01_sfnt_off0000ed77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED77 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001058e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1058E 10704 bytes
SHA-256: 05c8836b7f3e6b58b0ace6543692ee2ec9ac87f4568e7d4f93961c8e7e98864c
font_03_sfnt_off00011df5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DF5 16284 bytes
SHA-256: fde65c8cb77ea83157e3d1502ad2aee58f9d3905ec9a641983701f347f9e5115