Malicious PDF — malware analysis report

Static analysis result for SHA-256 adaa46f255d51254…

MALICIOUS

PDF

95.7 KB Created: 2021-08-24 23:09:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 01fdbad3306b1f11bfc65dcdb696de84 SHA-1: 1b1b4653e3e91b959521aaf286f4896e91daaaf2 SHA-256: adaa46f255d512544f88061b99fd609f886f737822c3b358ac00f5d6bfdaca8b
124 Risk Score

Malware Insights

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

The file is identified as a PDF containing a link farm, as indicated by multiple heuristics related to PDF link farms and external URIs. The ClamAV detection further confirms its malicious nature, classifying it as a phishing trojan. The numerous embedded URLs, many hosted on compromised or disposable domains, suggest an attempt to manipulate search engine results or redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4108

Heuristics 5

  • 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
  • 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://abofahed.com/userfiles/file/vonadabikexu.pdf In PDF document text
    • http://aarogyamedico.com/userfiles/file/49269240402.pdfIn PDF document text
    • http://thesecurityguardunion.ca/userfiles/files/mibep.pdfIn PDF document text
    • https://bringem.de/wp-content/plugins/super-forms/uploads/php/files/efe062093f63dabe765f5715895566f2/najufulubusotusi.pdfIn PDF document text
    • http://ngor2-3.com/file_media/file_image/file/wupujudedegepumuwi.pdfIn PDF document text
    • https://muzeumkonstancina.pl/attachments/file/26293857295.pdfIn PDF document text
    • http://hbleg.com/admin/userfiles/files/51097866207.pdfIn PDF document text
    • http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160723dd168465---74824379031.pdfIn PDF document text
    • https://iguanapools.com.au/wp-content/plugins/super-forms/uploads/php/files/i5algm2pbig3lkdhsog679uf6c/15375051981.pdfIn PDF document text
    • https://formapolis.it/wp-content/plugins/super-forms/uploads/php/files/25416375d8a0f0c88c877efb412867d3/jakofefepitiparijivofox.pdfIn PDF document text
    • https://www.beadvised.co.uk/wp-content/plugins/super-forms/uploads/php/files/ee3a17b4dadb50a25f75700e85ff514c/19913375216.pdfIn PDF document text
    • https://spencershaulageltd.co.uk/wp-content/plugins/super-forms/uploads/php/files/9a09d2d8c27bbc3c98abd64c7fbda0f9/bokonoweleli.pdfIn PDF document text
    • http://soldearenales.com/galeria/files/jedovelujaveru.pdfIn PDF document text
    • https://oriental-kitchens.com/userfiles/files/foparinufufumasoxupin.pdfIn PDF document text
    • https://finestblogger.de/wp-content/plugins/super-forms/uploads/php/files/n229c47jqs7eiudvr89tj1b1b7/mupasapuxafupa.pdfIn PDF document text
    • https://www.growxponential.com/wp-content/plugins/super-forms/uploads/php/files/7a08a7qccs225mt8u1np6ln2sj/3100886915.pdfIn PDF document text
    • http://benevolo.it/userfiles/files/43742867366.pdfIn PDF document text
    • http://endustriyelkiralama.com/wp-content/plugins/super-forms/uploads/php/files/f49ie3rgqq52cdl7jdimvs8053/92999289589.pdfIn PDF document text
    • http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094917cb94c0---fovukefimajix.pdfIn PDF document text
    • http://dolphinegypt.net/userfiles/file/93230155705.pdfIn PDF document text
    • http://tamlaproject.com/userData/board/file/kokexuwuxujisemegos.pdfIn PDF document text
    • https://rebates.forex/wp-content/plugins/super-forms/uploads/php/files/qhg97thn77fm034k6o987e2dg3/fovogel.pdfIn PDF document text
    • http://terezmisszio.eu/files/file/62538673792.pdfIn PDF document text
    • https://neoville.ru/wp-content/plugins/super-forms/uploads/php/files/4ad953e4cce803ec3b326376c3cbae69/fikebiridofekoferiximan.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=tamil+words+starting+with+iPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000135c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x135C2 16348 bytes
SHA-256: 581c030dcf62826899a345cdc79b380c90ff57f2adcebfa33c24499d8be0f851
font_01_sfnt_off00015fd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15FD8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1