Malicious PDF — malware analysis report

Static analysis result for SHA-256 b468e6af216c105d…

MALICIOUS

PDF

92.4 KB Created: 2021-08-20 00:23:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-17
MD5: 155dc16c9052769d1842b9e6e491922c SHA-1: db90e70a505a2948853f27eb8ae3806543ce5225 SHA-256: b468e6af216c105dd6f120cfbbd565a227c2c08d2ceb409deceeff1009adaa60
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised CMS upload storage or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. The presence of multiple PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics further supports this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b844ea8d9d6---44876097580.pdf In PDF document text
    • http://chocoenglish.com/_UploadFile/Images/file/43882732536.pdfIn PDF document text
    • http://adimhukuk.com/resimler/files/takis.pdfIn PDF document text
    • https://kemxoi.vn/app/webroot/files/images/pages/files/69640079417.pdfIn PDF document text
    • https://www.aserspa.net/wp-content/plugins/super-forms/uploads/php/files/gq8vgaf6avufaio7ua68vl5bi1/tafidigaxo.pdfIn PDF document text
    • http://xn--42-6kcdlkbomh7beggito5p.xn--p1ai/userfiles/file/nusoluneluxozenagoguwuli.pdfIn PDF document text
    • https://togeltop.net/contents//files/jonojavomipobudeluk.pdfIn PDF document text
    • https://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/a04658d0f00c626c12715ab16c07ace1/mikazizojaleturuj.pdfIn PDF document text
    • http://akcjonariusz.com/UserFiles/file/59036152994.pdfIn PDF document text
    • http://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607ad1a36987a---pixewotegubovevul.pdfIn PDF document text
    • https://kamber.dk/wp-content/plugins/super-forms/uploads/php/files/dd3b01e7bde78e410deb25d74a586be5/xagifasaruxuleg.pdfIn PDF document text
    • https://www.potterycommercials.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608ef1a7ea6c9---31702341144.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/6ee0vqbr12mgfb17i3jpg130tg/foloburupoled.pdfIn PDF document text
    • http://cy2hand.com/userfiles/jugudovetomimebozarutume.pdfIn PDF document text
    • https://regenerativetherapyforpain.com/wp-content/plugins/super-forms/uploads/php/files/b6c317d3b4d2aed34579e64e6c100611/bopobizowoguxiruxibed.pdfIn PDF document text
    • http://bulgankhangai.mn/userfiles/files/rosotoke.pdfIn PDF document text
    • https://sketchup360.vn/wp-content/plugins/super-forms/uploads/php/files/jmi9ik92kmscluh468bd7do5b2/sonakidugiv.pdfIn PDF document text
    • http://laiyi-art.com/userfiles/file/zikav.pdfIn PDF document text
    • https://slavica.ru/wp-content/plugins/super-forms/uploads/php/files/591e3c32e83937f1cc1e9d229ee45eeb/73621978019.pdfIn PDF document text
    • https://martybermanassociates.com/wp-content/plugins/super-forms/uploads/php/files/6c670ed29e63cb8b66a27d9279440323/50383210929.pdfIn PDF document text
    • https://vdbergelectro.nl/wp-content/plugins/super-forms/uploads/php/files/4109fcf5b796f0ec754d7c150c2f5e02/35453559723.pdfIn PDF document text
    • https://www.tessilgiada.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608d7fdfdc68a---rifimejerox.pdfIn PDF document text
    • http://bananamusic.tw/uploads//files/202108030605363459.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=yufkadan+peynirli+b%C3%B6rek+tarifleri+nefis+yemek+tarifleriPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ff4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF4D 19252 bytes
SHA-256: 99118b51dc41f2fcd10cf216dc19a33c36293d7a19b2a5dec4e8741495223040
font_01_sfnt_off00012eba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EBA 11184 bytes
SHA-256: 41dae37a0e804c06940c28d6419ee3dc31ad6b6ba2c445b534a857eac2842a52
font_02_sfnt_off00014893.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14893 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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