Malicious PDF — malware analysis report

Static analysis result for SHA-256 61b251b1a0d70f10…

MALICIOUS

PDF

103.8 KB Created: 2021-07-25 15:20:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: a806c3a2e5dfffd68157d91786056f5f SHA-1: 7d55880061fd63f9d1796b440c8b34e8dda2c687 SHA-256: 61b251b1a0d70f10e90aae3f498bc9b74a555afd81a55c5a947de6ce241f2738
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document contains a link farm pointing to numerous URLs, many of which are hosted on compromised CMS upload directories or disposable domains, suggesting a phishing or malware distribution scheme. While no scripts were explicitly extracted, the PDF structure and the nature of the URLs strongly suggest it's designed to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9885

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://yuha.be/_files/file/16970113232.pdf In PDF document text
    • http://mim2010.ru/userfiles/file/vojerufakete.pdfIn PDF document text
    • http://constructionone.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606c7711f3e4e---fomagolafazetaxeme.pdfIn PDF document text
    • https://eyetracking.pl/userfiles/file/12561605799.pdfIn PDF document text
    • https://ifacemount.com/wp-content/plugins/super-forms/uploads/php/files/nd7pf7h9heshun7sgnqhc1jten/17625363111.pdfIn PDF document text
    • https://www.partyshuttlebus.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a238da0a619---91140759147.pdfIn PDF document text
    • https://smarttactic.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160805ba203f8c---59670836481.pdfIn PDF document text
    • http://amfmeg.org/wp-content/plugins/formcraft/file-upload/server/content/files/160827d327b01a---14417692129.pdfIn PDF document text
    • http://wang023spa.com/userfiles/202107file/2021070217155970554.pdfIn PDF document text
    • https://gangwontaxi.com/FileData/ckfinder/files/20210705_EBF9C2A45EB9C850.pdfIn PDF document text
    • https://otdelkamos.ru/wp-content/plugins/super-forms/uploads/php/files/a85edb49efcfeba102287c19286e7785/8587938789.pdfIn PDF document text
    • http://ne-moloko.ee/wp-content/plugins/super-forms/uploads/php/files/1ab2fa29a8feca38860d66303bf8429a/27418578339.pdfIn PDF document text
    • http://www.anieliasfx.com/uploads/textareas/file/3452172464.pdfIn PDF document text
    • http://xahscw.com/userfiles/file/tiforofidonidupimikavosa.pdfIn PDF document text
    • https://feriaesotericadeatocha.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa163642948---loremiv.pdfIn PDF document text
    • http://dkmmotor.com/files/userfiles/file/mixiti.pdfIn PDF document text
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160b2368fa291c---bugakudefaz.pdfIn PDF document text
    • https://insights3.com/wp-content/plugins/super-forms/uploads/php/files/aea025cdb88eee2d2a2a6c204d371509/22836196473.pdfIn PDF document text
    • https://www.blackandwhite-salon.com/wp-content/plugins/super-forms/uploads/php/files/4ac6d1ef4a64cff716456847aaf8f9ba/fuzozodunelas.pdfIn PDF document text
    • http://trlgpc.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/jasunovagaved.pdfIn PDF document text
    • https://alakharia.com/public_html/userfiles/file/78501313934.pdfIn PDF document text
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/mvrmah3hvc17do11ternf9demp/55604782587.pdfIn PDF document text
    • http://stillwaterponies83.com/clients/74660/File/17790554113.pdfIn PDF document text
    • https://mangmalungtea.com/userfiles/file/52700170420.pdfIn PDF document text
    • https://www.mybizwebsites.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d4e4ce1ee27---84218125757.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=over+the+hedge+full+movie+download+720pPDF 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_off00011ab0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AB0 18784 bytes
SHA-256: 425bd98cc2b7e8b58537f798738872a169b8225580dc7e5468179dcc4426077e
font_01_sfnt_off00014b82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14B82 5100 bytes
SHA-256: c07d61d80b5cddf9e174a1d7f73fa87730b2841b33f3b3f457b66eb916846bb8
font_02_sfnt_off00015e08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15E08 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off0001761f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1761F 11344 bytes
SHA-256: e76fd6b04173da7641b5119f889a399a1d214d8ade4c82a4a0bb88ab6b4b134d

Open this report in the interactive analyzer, or submit your own file for analysis.