Malicious PDF — malware analysis report

Static analysis result for SHA-256 47110b8efed0a779…

MALICIOUS

PDF

82.4 KB Created: 2021-09-13 18:15:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: d0228d95d2a085147e9750edc72c38e1 SHA-1: 25b03f1135eb7bbc4f5b4f0d2ac42328d1504e36 SHA-256: 47110b8efed0a779bd9f8230c752640e1250ec81dca6dd4295af30f8c4e64e02
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file is identified as a malicious PDF by ML classifiers and ClamAV. It contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, suggesting a phishing or credential harvesting campaign. The heuristic firings indicate the PDF is structured as a link farm, likely directing users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://huntic.ru/uplcv?utm_term=new+update+coc+2021 PDF link annotation
    • http://abpjseah.news-read.com/upload/files/49360455821.pdfIn PDF document text
    • https://birotex.rs/images/files/xukula.pdfIn PDF document text
    • http://ilsogno-bomboniere.com/userfiles/files/4760057943.pdfIn PDF document text
    • https://www.hagensmarketing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c7d014ae39---98788980340.pdfIn PDF document text
    • http://kenzoum.org/home/integrity/public_html/ckfinder/userfiles/files/xatilodovukusevomotukasa.pdfIn PDF document text
    • https://drisraadentalcenter.com/userfiles/file/mosikojonotelok.pdfIn PDF document text
    • http://ttlengenharia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613bfa5fdc700---marukodudofikaribuxupemi.pdfIn PDF document text
    • http://getwealthythisyear.com/ckfinder/userfiles/files/gekitafadudemeroni.pdfIn PDF document text
    • https://scalper.ir/data/files/file/40336877319.pdfIn PDF document text
    • http://daegyung.kr/userfiles/file/20210903050517.pdfIn PDF document text
    • http://careerhack.net/wp-content/plugins/formcraft/file-upload/server/content/files/1613de1b62f74e---wukujelunujugivaxudari.pdfIn PDF document text
    • http://energosol.pl/images_cms/file/17016731251.pdfIn PDF document text
    • https://giraffeng.net/infodaily/gen-ckfinder/userfiles/files/37448102076.pdfIn PDF document text
    • http://lso-msm.fr/userfiles/file/giveri.pdfIn PDF document text
    • https://camphacement.vn/upload/files/tebijuzalokomurapajow.pdfIn PDF document text
    • http://tagsu.com/attachments/fckattachments/file/gakog.pdfIn PDF document text
    • https://rivieresoceanie.com/ckfinder/userfiles/files/92220500465.pdfIn PDF document text
    • http://jobcred.com/rk/jobcred/uploads/image/file/bojodogedidot.pdfIn PDF document text
    • http://prosefkuchare.cz/userfiles/25064260103.pdfIn PDF document text
    • http://www.anclupnapoli.it/userfiles/file/59604573726.pdfIn PDF document text
    • http://mamnonsaokhue.vn/app/webroot/files/ckfinder/files/bexuwupapajavetagulujas.pdfIn PDF document text
    • http://cafesezony.ru/fck_editor_files/files/14741661282.pdfIn PDF document text
    • http://soojuspilt.ee/files/file/wasibudabavizipuwajofefus.pdfIn PDF document text
    • http://abwmountvernon.com/uploads/files/14374055813.pdfIn PDF document text
    • 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_off0000dd6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD6A 17784 bytes
SHA-256: c5bf3117bafb6ea481152937c3cda33eca500e2569cdf055be1fc2ae53f2b66f
font_01_sfnt_off00010bc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BC3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000123da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123DA 10452 bytes
SHA-256: b939be8e5f80e7af670cc41798f9f455750a8c19be395c9ce0580a156f35e186