Malicious PDF — malware analysis report

Static analysis result for SHA-256 14850c03faebe325…

MALICIOUS

PDF

76.0 KB Created: 2021-09-02 05:20:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 560d118f374941ba7897734edaee5d86 SHA-1: d75c461984f1a4c0451ae17960cd91e232fc00ff SHA-256: 14850c03faebe32505beefdae414fb6d0c1a1b2c4ff74b8d0a3a57a9313b3d87
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many of which are hosted on compromised WordPress installations or disposable domains, suggesting a phishing or malware distribution scheme. The PDF structure and embedded URIs are consistent with techniques used to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://cructi.ru/uplcv?utm_term=baby+tooth+pulled+out+with+root
    • https://centrobrands.com/wp-content/plugins/super-forms/uploads/php/files/c10a7b61ee154022dc92a91e62cf8b81/suremelekupavewamiziliku.pdf
    • http://naturallabs.fr/userfiles/file/83775314449.pdf
    • https://alutat.com/data/file/wonoxojawazovopezopug.pdf
    • https://www.oasipizza.it/wp-content/plugins/formcraft/file-upload/server/content/files/16083c3f1d6ed5---fadegesatuvarod.pdf
    • http://www.homefacelifters.com/wp-content/plugins/super-forms/uploads/php/files/7a810eee6895e3abd6f6c4eb99e10a52/66362123439.pdf
    • https://law.com.sg/wp-content/plugins/super-forms/uploads/php/files/57863434e6a37d7b5c7c98ca4d781e39/35605871922.pdf
    • https://nolimitscenter.be/peausitive/images/FCKeditor/file/26988463594.pdf
    • http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afab4e5c26c---98830941730.pdf
    • http://ilksolar.com/Images/Media/files/18859133865.pdf
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16098d61d7d94f---vilelavimenavepozu.pdf
    • http://xn--90aoj0agf7cq.xn--p1ai/uploads/files/18096579625.pdf
    • http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087158de5061---tujarefebamowi.pdf
    • https://adikkeempat.com/contents//files/bokuxijumapugenonavebir.pdf
    • http://unicorn-furnitures.com/d/files/39263844881.pdf
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091b90a134e2---pasoroniwetugisiwozijep.pdf
    • http://longarmquiltacademy.com/fckeditor/userfiles/file/bokugosulizolamomu.pdf
    • http://vdadanang.vn/app/webroot/assets/files/34072643310.pdf
    • https://macroedunet.com/userfiles/file/sidiwapuwifugaboriverolem.pdf
    • http://abacusnancy.com/userfiles/file/fesuletiriso.pdf
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bcac6eedc5e---28598346075.pdf
    • http://www.canadavisaservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b621ff16807---57851806054.pdf
    • http://www.ciesol.es/ckfinder/userfiles/files/93090086660.pdf
    • 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_off0000c7f8.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xC7F8 16792 bytes
font_01_sfnt_off0000e00f.bin
4b1c367c627c855b800a0fd9cf5d84c5bc6146177ecb3cd082445b9c282479d3
pdf-font-stream PDF embedded font (sfnt) at offset 0xE00F 10708 bytes
font_02_sfnt_off0000f89c.bin
3e26b21d6379a124a5bdb6e9287c32e5a773c303e9fe18a9b5207f816abe5c22
pdf-font-stream PDF embedded font (sfnt) at offset 0xF89C 15976 bytes