Malicious PDF — malware analysis report

Static analysis result for SHA-256 32fae4df307a9fa5…

MALICIOUS

PDF

91.4 KB Created: 2021-08-01 06:47:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: b15d30184c4147ff7b7e5dc7ec438076 SHA-1: 794344121cf0ee0d1838e75ac4be777d10c41bf6 SHA-256: 32fae4df307a9fa57208799688d08f4539ac5cd6d9e3160bedb7957fae93d2c4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the structure and URL patterns are consistent with a malicious PDF dropper.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9905

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://pixomot.ru/uplcv?utm_term=how+do+i+reset+my+jeep+grand+cherokee+radio PDF link annotation
    • http://schodylux.pl/userfiles/file/guvenubapefupo.pdfIn PDF document text
    • http://orhs76reunion.com/clients/30721/File/77071671354.pdfIn PDF document text
    • http://dwhs79.com/clients/15834/File/49991532568.pdfIn PDF document text
    • https://petek.biz/resimler/files/61569712911.pdfIn PDF document text
    • https://deesudcoolingtower.com/userfiles/file/fupoditubuzobosudo.pdfIn PDF document text
    • https://saraelv.no/wp-content/plugins/formcraft/file-upload/server/content/files/1607935e33a9bb---26113041054.pdfIn PDF document text
    • https://realestateconnect.pro/wp-content/plugins/super-forms/uploads/php/files/715338h4ravkh1apph6p3b9mh6/dituremivugukesezepevut.pdfIn PDF document text
    • http://www.circoloaletrium.it/wp-content/plugins/formcraft/file-upload/server/content/files/16079f23844646---8601672391.pdfIn PDF document text
    • https://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b463a2f01e0---ferotarakasipevuwor.pdfIn PDF document text
    • http://es-umzuege-transporte.de/wp-content/plugins/super-forms/uploads/php/files/b13b6b7d26a37dbd36b66f350d56666a/gamajavabolikaxuperina.pdfIn PDF document text
    • https://www.auditek.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607138e0a994b---tukusivazaritakepuvimikon.pdfIn PDF document text
    • http://elise.pe/images/file/ruziporifuzevu.pdfIn PDF document text
    • https://humantouchtranslations.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/160ce083d643af---92487263762.pdfIn PDF document text
    • http://khocabien.com/uploads/files/ferejokukabe.pdfIn PDF document text
    • https://smoothnomad.com/wp-content/plugins/super-forms/uploads/php/files/sjvqf7tgilph04p0ntevp8hkri/zufebuxubegifejujebumi.pdfIn PDF document text
    • http://dentish.ru/ckfinder/userfiles/files/pimutuzinan.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/9jjuv6j0qroljc0ubjbviqqub7/95032686239.pdfIn PDF document text
    • https://kachhiproperties.com/wp-content/plugins/super-forms/uploads/php/files/cq8thp40477kju99970m1rmn14/72310561524.pdfIn PDF document text
    • http://lapenya.cat/imgjovesnaves/file/nizarovejokutagu.pdfIn PDF document text
    • http://bainihu.com/upfiles/editor/files/sisele.pdfIn PDF document text
    • http://ehomeforeclosure.org/images/file/wubesur.pdfIn PDF document text
    • http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/160a6da8199eeb---raxesonod.pdfIn PDF document text
    • https://gfow.om/wp-content/plugins/super-forms/uploads/php/files/tq1b746miub30n5kr2h3m1bnmm/somagekedoji.pdfIn PDF document text
    • https://laihouston.com/wp-content/plugins/super-forms/uploads/php/files/72da2adff0a215181f53c1f90e84bedc/rigafaxuz.pdfIn PDF document text
    • http://www.cascinasorigherio.it/wp-content/plugins/formcraft/file-upload/server/content/files/16080271490f19---821188953.pdfIn PDF document text
    • http://www.sbawerribee.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16086734e2daf9---51184754950.pdfIn PDF document text
    • https://khanikango.in/file/zelobibami.pdfIn PDF document text
    • https://travels-ukraine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5d1faf0bb5---98151171637.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010059.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10059 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001186b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1186B 16996 bytes
SHA-256: d467f222adb97c9599bdce21a8a442dc50c6efa3cd4ac22f2224eba3ae2433fc
font_02_sfnt_off000144f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x144F0 11328 bytes
SHA-256: dfae34bb3a63d6258c1daadf8ec56c42cfd03e670151be19f38544e5c3354bd7

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