Malicious PDF — malware analysis report

Static analysis result for SHA-256 12ddc1b544b1466e…

MALICIOUS

PDF

91.0 KB Created: 2021-07-17 11:24:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 182a6e00628068e38531fff8abd0b970 SHA-1: 13058a4f8c207c67786c5e24a1212267a3f31088 SHA-256: 12ddc1b544b1466ea9d091d9890d1f937454f21486ab82d2ec16e1685bd72a42
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a link farm pointing to multiple domains, some of which are hosted on compromised CMS uploads or disposable hosting, indicating a likely phishing or SEO poisoning attempt. The document body is heavily obfuscated and unreadable, providing no further context on its specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9924

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 http://exantusfamilyreunion.com/clients/9/96/968554593547eb574606130639276270/File/jipovuwibonuladeloli.pdf In PDF document text
    • https://www.treehousecare.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606f65ee8e762---37565964660.pdfIn PDF document text
    • http://kondicionery-ivanteevka.ru/upload_picture/file/24820861437.pdfIn PDF document text
    • https://vico-inmobiliaria.com/ckfinder/userfiles/files/47873633820.pdfIn PDF document text
    • http://www.cascinasorigherio.it/wp-content/plugins/formcraft/file-upload/server/content/files/160f02dcacc37c---kanisidurokoki.pdfIn PDF document text
    • http://perfectthesale.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a75862b593---12200012496.pdfIn PDF document text
    • http://osrclass1967.com/clients/8/84/84e84eb3bb32f45446e669e24fea3ebc/File/84982335849.pdfIn PDF document text
    • https://www.reflectionuk.com/wp-content/plugins/super-forms/uploads/php/files/ll31khearlftm9uhvvh83jl40s/popefug.pdfIn PDF document text
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb74e910c1c---18741894345.pdfIn PDF document text
    • https://sirikulsteel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083e9b1df210---xitamarepikiwosipalonutut.pdfIn PDF document text
    • http://vibrosystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160802d4b60c47---63824937523.pdfIn PDF document text
    • http://stalmost.pl/userfiles/file/rotosuribebizibo.pdfIn PDF document text
    • http://www.kliningstroy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160984e19728be---wixudilalefufededotatuzob.pdfIn PDF document text
    • http://hanleyresources.com/images/xafigasurub.pdfIn PDF document text
    • https://grandhotelbulgaria.com/userfiles/file/fawuxukozinamipiganojib.pdfIn PDF document text
    • http://www.goldenlantern.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160942ba8cb3fc---giliwekukopuviwadoga.pdfIn PDF document text
    • http://przedszkolenisko.pl/userfiles/file/48814101951.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/160dc9c3be9d23---tigob.pdfIn PDF document text
    • https://healthmatters.me/userfiles/file/zixigobuzamefid.pdfIn PDF document text
    • http://www.thebetterinsurance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bae1db20bdf---61190388075.pdfIn PDF document text
    • http://vudafrique.com/wp-content/plugins/super-forms/uploads/php/files/eef94387ac1a1fea20609ddbdadca1b6/takozalixuremajiwu.pdfIn PDF document text
    • http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/bddb8af93926dce5f9487e0285f55cdc/55493873340.pdfIn PDF document text
    • http://ridendo.cz/files/file/limolazoxivumubadidegiva.pdfIn PDF document text
    • http://a-kamen.com/userfiles/file/tozamanoxituga.pdfIn PDF document text
    • http://yourhealthyanswer.com/ckfinder/userfiles/files/vazule.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=titration+curve+of+weak+acid+with+strong+basePDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA90 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000102a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102A2 16792 bytes
SHA-256: 7a4a5e01c134898353669fb2bd795c5bb5599647fc2c4474a28d92d70ef50470
font_02_sfnt_off00012eb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EB0 11156 bytes
SHA-256: 7508e18d53e82a822e8608177b1aaaed9a374134ed433ee37f92785f74ba680a
font_03_sfnt_off0001489a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1489A 16140 bytes
SHA-256: 00b1f632e8afe72716c8bcdb76b7901b56c060d1dc0f96f3f5c1b8373b85735b

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