Malicious PDF — malware analysis report

Static analysis result for SHA-256 70414bd60821677b…

MALICIOUS

PDF

62.1 KB Created: 2021-06-24 04:00:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 760a4f10431702f8f6ca537d8b75743f SHA-1: 02c9dd43fd8df07b1d7873d3208e0bac02c257e4 SHA-256: 70414bd60821677b038bbc169b8bb7dc0e63ffdcbc5ae024c479cfd67354348c
156 Risk Score

Malware Insights

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

The PDF contains a large number of links, many pointing to compromised WordPress sites, indicating it functions as a link farm. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution through these links. No scripts were extracted, and the document body was heavily obfuscated, limiting further analysis of specific payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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
  • 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://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160727948bfd4a---14841984813.pdf In PDF document text
    • https://monarchwinemerchants.com/wp-content/plugins/super-forms/uploads/php/files/4bf4fb3eb4793f6fb428e1981ea25318/genorojegutuvi.pdfIn PDF document text
    • https://jdrum-music.com/uploads/ckfiles/files/dagozujoweko.pdfIn PDF document text
    • http://ats-dz.com/userfiles/file/zisil.pdfIn PDF document text
    • https://militarynetwork.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608b62ec3c9aa---76267919179.pdfIn PDF document text
    • http://pincailight.com/zk/UploadFile/file/2021062110453873499.pdfIn PDF document text
    • http://abc-tel.ru/data/File/wiwotuvizutuwafetabozejog.pdfIn PDF document text
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b08e847ff4f---53693280244.pdfIn PDF document text
    • http://allasclub.com/campannas/file/7146236686.pdfIn PDF document text
    • http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b0b3fed8dd---33696105680.pdfIn PDF document text
    • http://adabaskimerkezi.com/upload/file/sazixudukubome.pdfIn PDF document text
    • https://costumeworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fe0d98a672---14185143197.pdfIn PDF document text
    • http://adaviestransportltd.com/userfiles/file/53743606915.pdfIn PDF document text
    • https://atraba-holding.com/userfiles/file/35897280897.pdfIn PDF document text
    • http://www.ashtralmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090e104d5759---26673221653.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/384022d2090fde66068b9b51862c64dc/79462874374.pdfIn PDF document text
    • http://www.cuadernos.in/wp-content/plugins/formcraft/file-upload/server/content/files/1609569c209ff5---nafegevewikofovukakuzorub.pdfIn PDF document text
    • http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/16087b509afea5---24654228369.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=psychology+books+pdf+freePDF 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b66f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB66F 5516 bytes
SHA-256: 33a175934e1fc023bd7f2a40f0ec36d9e745068e5df60b0f376ee9165c16dee9
font_01_sfnt_off0000c931.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC931 10012 bytes
SHA-256: 566219a743040d82929df6b6aaf1deae8fa1d2666ec5223e69cfaa5483e9d4f5