Malicious PDF — malware analysis report

Static analysis result for SHA-256 37e5513f570402f3…

MALICIOUS

PDF

88.2 KB Created: 2021-09-02 01:16:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d324862579a44c3a7558d732eb7df6e0 SHA-1: 74d4b993f48e50ee4a345ea6d1d55dfa7dcb6c21 SHA-256: 37e5513f570402f35982f6a96160be3c4ef78a9a96156f27f109fe21b743ca1a
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics reveal that the PDF contains a link farm pointing to compromised WordPress upload storage, suggesting a phishing or scam lure. The embedded URLs are likely used to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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.hagensmarketing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c74a1ea303---28057096518.pdf
    • https://acethamessecurity.co.uk/wp-content/plugins/super-forms/uploads/php/files/df21ab37ee252cac26477dd982759879/manavut.pdf
    • http://gistfamilyreunion.com/clients/8/8c/8cbf0a40baaab9dd4734ff2cdbb1e120/File/45081646840.pdf
    • http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac83364b159---wokofuvovis.pdf
    • https://snqrsl.quebec/upload/editor/file/84499095386.pdf
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/v1mpnte87ultdqhehn5kan25v6/muwax.pdf
    • http://promocode.lu/userfiles/files/sapexikubutasatepawadap.pdf
    • https://haysalon.com/public_html/userfiles/file/69700468258.pdf
    • http://inhome360.ru/admin/ckfinder/userfiles/files/48189479005.pdf
    • https://p99.tw/pro_pic/files/pijalokewarobuf.pdf
    • http://quickfix-poland.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082a2571f741---debalebejojidudati.pdf
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/9e793e2aee27bad8faca179857cbeac4/99540736197.pdf
    • https://www.reparaciondebomba.com.ar/wp-content/plugins/super-forms/uploads/php/files/pnrrntnqb9o3koqiq00ur11pg5/36345760720.pdf
    • http://www.haztartasigepszakuzlet.hu/pics/file/bepobupapobapenudosew.pdf
    • https://area34.info/wp-content/plugins/super-forms/uploads/php/files/q61o8sue8etf5h3v6kdignqgk0/nunoma.pdf
    • http://www.highlandmetals.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160aba653c6130---199138017.pdf
    • https://pmfegypt.com/userfiles/files/17927825090.pdf
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/958dl6pjp5mb2bsk44gu3525g0/75951551897.pdf
    • http://www.zulfugar.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606fca05b6151---famusixi.pdf
    • https://www.hermanosvalerorecio.com//ckfinder/userfiles/files/dujedijufifot.pdf
    • http://imhkayseri.com/resimler/files/zabefelake.pdf
    • http://thienlongadv.com/upload/files/84976527131.pdf
    • http://curry-box-deluxe.de/userfiles/file/fasuvurujukozudikititopo.pdf
    • https://neoville.ru/wp-content/plugins/super-forms/uploads/php/files/dcc852db96cd8f0cfccd99c35afa71a8/fetebidad.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=surah+e+yaseen+in+which+para
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec76.bin
8446b834fdbcec43af2b6ccc6e31714199837575d1846d502fc4ba185934eb42
pdf-font-stream PDF embedded font (sfnt) at offset 0xEC76 21336 bytes
font_01_sfnt_off000121d8.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x121D8 16792 bytes
font_02_sfnt_off000139ef.bin
be1910c2beb2fc9e9ff4a34ab1ea5c377c1a59e6d6e34270138efde51267a7ee
pdf-font-stream PDF embedded font (sfnt) at offset 0x139EF 10580 bytes