Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7e9cf46ff5c13a1…

MALICIOUS

PDF

80.4 KB Created: 2021-08-05 16:16:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: aa5f0daadec0b14761510c80e955fc52 SHA-1: d22f60ad8e98b7573913f571cbd02b09bfd9587f SHA-256: a7e9cf46ff5c13a1c8e99b93a6357a619e3909325c41538b1f67e9656c5114d1
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV and exhibits characteristics of a link farm, with numerous embedded URLs pointing to compromised CMS uploads and disposable hosting. The PDF document's structure and embedded links suggest an attempt to lure users to external sites, likely for phishing or malware distribution. No scripts were extracted, but the PDF structure itself is the attack vector.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4794

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://belgradenightlife.info/wp-content/plugins/super-forms/uploads/php/files/sb4qqf3a627f3nireei1tl58b0/11341172292.pdf In PDF document text
    • http://cableesmaltado.com/d/files/91483131944.pdfIn PDF document text
    • https://www.hed-endo.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1606f53fbe5888---96164405578.pdfIn PDF document text
    • https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bcfc56b240f---16333051686.pdfIn PDF document text
    • http://anthonyvienna.com/sites/default/files/file/47237665602.pdfIn PDF document text
    • https://www.saammohaseb.ir/wp-content/plugins/super-forms/uploads/php/files/0840ecb999d1e43afb0a1c04a267c6e1/bezototagutilalad.pdfIn PDF document text
    • https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/ba23c2f6f45aea37472b35e8ef558c94/80974291570.pdfIn PDF document text
    • https://cremeconferences.com/wp-content/plugins/super-forms/uploads/php/files/356839d9d1cd736f199454eed1622763/baxujazusojosakagol.pdfIn PDF document text
    • https://addsfly.com/userfiles/file/fimob.pdfIn PDF document text
    • http://accurateverdicts.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a151cd5acb2---jalos.pdfIn PDF document text
    • https://cmsschoolkg.org/userfiles/file/denika.pdfIn PDF document text
    • https://www.nobleorthodontic.com/wp-content/plugins/super-forms/uploads/php/files/61f4f085bd757cf0191760af2a9da550/wusibemijuvusigipuso.pdfIn PDF document text
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d39d2b19b3---32178314973.pdfIn PDF document text
    • https://leunamgroup.com/wp-content/plugins/super-forms/uploads/php/files/ea5bf66262b91115bb7be75d2b2ed727/dujuzavazosuliwuti.pdfIn PDF document text
    • http://altelaw.com/uploads/image/file/fufasafizipoguberok.pdfIn PDF document text
    • https://ecowaytechnologies.com/ckfinder/userfiles/files/mimupud.pdfIn PDF document text
    • https://coloreverything.love/wp-content/plugins/super-forms/uploads/php/files/1373617d85eb82a288c0cdd909016313/32869621799.pdfIn PDF document text
    • http://lapenya.cat/imgjovesnaves/file/neturadarutidoxe.pdfIn PDF document text
    • http://theettiaresottawa.com/clients/e/e8/e8f54e69a7463df9fd0adff13cd8e90f/File/23596717639.pdfIn PDF document text
    • https://hafa-verein.de/wp-content/plugins/super-forms/uploads/php/files/fbae70b9ba361d843091c998a8479b50/nelavonejenejob.pdfIn PDF document text
    • https://markyatirim.com/resimler/files/52984169121.pdfIn PDF document text
    • http://market-oborudovanie.ru/upload/file/99448236605.pdfIn PDF document text
    • https://forkidsvietnam.vn/wp-content/plugins/super-forms/uploads/php/files/udabco1imfmdt15bs81kdn8uov/taninerixirijaxitokol.pdfIn PDF document text
    • http://www.fullertherapy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e7607429c45---51093251371.pdfIn PDF document text
    • https://inchirierielicopter.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160c34db4bf901---radisunu.pdfIn PDF document text
    • http://timebymtm.com/upload/files/tijebagujaruxovu.pdfIn PDF document text
    • https://christembassybarking.org/wp-content/plugins/super-forms/uploads/php/files/12cea6acc0f784851b468309d91a296f/94375107609.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=barbie+and+the+diamond+castle+full+movie+in+hindi+free+downloadPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011b4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B4F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1