Malicious PDF — malware analysis report

Static analysis result for SHA-256 0708d2a80853c1dc…

MALICIOUS

PDF

92.1 KB Created: 2021-07-29 15:38:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 3bdaa01d42529c6c8d22a3b4a42a7806 SHA-1: e8f5ae8d8c9b42a7d2fe7276b6d3790a15fac72b SHA-256: 0708d2a80853c1dc3a21f54d2ad319e20aa4a6309ec83256650242836589a47a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The file contains a link farm pointing to compromised WordPress upload storage and other disposable hosting, suggesting it's used to distribute further malicious content. The presence of embedded URLs and the nature of the heuristics indicate a phishing or malware distribution scheme, likely initiated via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://www.cocochan.com.pk/wp-content/plugins/super-forms/uploads/php/files/49efd05683d6b0dca2fc3089de3b750d/siguvunuduvurigirobor.pdf In PDF document text
    • https://teenvolunteer.org/wp-content/plugins/super-forms/uploads/php/files/607c078a7787515c6daca647717d70ea/pipizunisejokolexejanev.pdfIn PDF document text
    • https://vico-immobilien.com/ckfinder/userfiles/files/33361385945.pdfIn PDF document text
    • https://inchiriereelicopterromania.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160cd863b6ca5a---45058101373.pdfIn PDF document text
    • http://cherryontop.pl/upload/fotki/file/94612854358.pdfIn PDF document text
    • https://autoteam.in/ckfinder/userfiles/files/risinazojozosesumavox.pdfIn PDF document text
    • https://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/960d18189408ce4f4ab9f68d1aa1b967/13951913340.pdfIn PDF document text
    • http://perlawarmii.pl/userfiles/file/71772588942.pdfIn PDF document text
    • https://koratspring.com/upload/file/vizegovozolabi.pdfIn PDF document text
    • https://www.inter-tube.co.uk/wp-content/plugins/super-forms/uploads/php/files/d1b8cc601af08a8311225d41e874dce0/45425733821.pdfIn PDF document text
    • https://sygimportaciones.com/wp-content/plugins/super-forms/uploads/php/files/bqpdt50n73t7pninttgpqiiaa7/13366812007.pdfIn PDF document text
    • http://manninareunion2012.com/clients/0/03/03b30fdf9aaeeba733afadbef254ff7b/File/77597321516.pdfIn PDF document text
    • https://mithermomix.com.mx/wp-content/plugins/super-forms/uploads/php/files/3d42470382c5ea12316205f5926675e5/81455372684.pdfIn PDF document text
    • http://mdbim.pl/ubezpiecz/obrazy/file/43672816604.pdfIn PDF document text
    • http://qzgj.cn/upload/file/6391096100.pdfIn PDF document text
    • http://surtek.biz/image/files/20150115_235824.pdfIn PDF document text
    • http://wbbray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c3d292e6d8---57393741488.pdfIn PDF document text
    • http://am-assets.com/aom/magnolia/userfiles/file/53819051610.pdfIn PDF document text
    • https://robinio.de/wp-content/plugins/super-forms/uploads/php/files/dse7di97e2gj2qf37o8ar9hp62/getokimelazegawatekivon.pdfIn PDF document text
    • http://www.fullertherapy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fa755a1d0d---22389984615.pdfIn PDF document text
    • https://ipic.vn/userfiles/file/kazowuzegekitilabet.pdfIn PDF document text
    • http://penzionriverside.cz/files/file/5522411460.pdfIn PDF document text
    • http://stepsforstarlight.ca/clients/c/c6/c668404594a1c08d975ab50c7bec58f6/File/98572851383.pdfIn PDF document text
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/16091531972d6a---watujex.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=suicide+squad+full+movie+download+in+hindi+dubbed+filmywapPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fb31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB31 19564 bytes
SHA-256: 3fbcaf194f232cd985aada4864647d1fd29bf210cffe645b0ac624d6b4e26786
font_01_sfnt_off00012dbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DBE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000145d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x145D5 11416 bytes
SHA-256: b3381a2e3c09b4377806c6229b4a8ea5865ae02e350b9a3ed9b3b6c08c020ff6

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