Malicious PDF — malware analysis report

Static analysis result for SHA-256 66c47980ce350c8d…

MALICIOUS

PDF

87.5 KB Created: 2021-08-02 02:09:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 5282e6b727b60909b382c7d9840f7bd4 SHA-1: d0fc8b4e06ed7716eecc328aec993b4c40c4be53 SHA-256: 66c47980ce350c8ded951ac193895ab96a53fab410d7816cc4e4d7fef81261e5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous URLs pointing to potentially compromised websites, including one hosted on a compromised WordPress upload storage. The presence of external URIs and link farm characteristics suggests an attempt to lure users to malicious sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://lacasedescaraibes.fr/file/lamewigolilelizedegufave.pdf In PDF document text
    • http://ajtoablakcentrum.com/_user/file/jofegedakado.pdfIn PDF document text
    • http://argyleliquidations.com/userfiles/files/42534145231.pdfIn PDF document text
    • https://yuktiedu.com/wp-content/plugins/super-forms/uploads/php/files/00799d2478cae19be15f6ec150aa06bb/63789060503.pdfIn PDF document text
    • https://sweetestspaparty.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fea8b7527f7---73045701508.pdfIn PDF document text
    • http://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096a0caa4580---tikebepovenobubuzuxorido.pdfIn PDF document text
    • https://bloc-immo.com/images/vigob.pdfIn PDF document text
    • http://wannawwannie.pl/userfiles/file/jorogeradugo.pdfIn PDF document text
    • http://trips-in.com/ckupload/files/vapeganefigotikat.pdfIn PDF document text
    • http://symbioticlifetech.org/attfile/fckimg/file///2021070823349_919869071.pdfIn PDF document text
    • http://www.publicitymailing.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160783b8a7f80e---20066296116.pdfIn PDF document text
    • https://bestmiamiturf.com/wp-content/plugins/super-forms/uploads/php/files/84f597b8952e470269b4ec7fb641bcbf/63416048152.pdfIn PDF document text
    • http://kmbb.at/userfiles/file/56799215793.pdfIn PDF document text
    • http://recamonde.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609427ebd3e37---relijazoboxuzatizide.pdfIn PDF document text
    • https://bdcomunicazione.it/file/3681839836.pdfIn PDF document text
    • https://natyabio.com/uploadfiles/33184268583.pdfIn PDF document text
    • https://canadiancontractorservices.com/wp-content/plugins/super-forms/uploads/php/files/lnbke3pppvmnlj2ttfks4457s3/tasusagixe.pdfIn PDF document text
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160f42958079e9---lisevalixewavi.pdfIn PDF document text
    • https://notofthisgalaxy.com/wp-content/plugins/super-forms/uploads/php/files/9kr1qf8jqcvmqreifcue74ac6g/5755055006.pdfIn PDF document text
    • http://www.yourhealthyourchoice.org/wp-content/plugins/formcraft/file-upload/server/content/files/16086f0d638bec---garefunuvowus.pdfIn PDF document text
    • https://teenvolunteerdallas.org/wp-content/plugins/super-forms/uploads/php/files/85f9ed34e5ef9eee5445d4131194cd15/weguwoxidisozif.pdfIn PDF document text
    • http://portalcom-b2b.es/img/user///file/_0792746001625492937.pdfIn PDF document text
    • http://bagpack.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/160a16ea6516d4---xarivo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=minecraft+windows+10+edition+download+free+full+gamePDF 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_off0000f14e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF14E 16972 bytes
SHA-256: 408e33ba7cbe8f25df3bc12962a1df21b093379f84f0d22ba2f79e352a8f492b
font_01_sfnt_off00011da5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DA5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000135bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x135BC 11172 bytes
SHA-256: 39c0155255d2257f29ba9d59ab8fb2bb49468d6531251616aa00a88046cebf32

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