Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f8217da3961e9e2…

MALICIOUS

PDF

76.1 KB Created: 2021-10-10 01:46:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 5a2aa5af471c6b9a6329e5b7d4dfbec4 SHA-1: 71a3449816c3ff11fbd5ffc27a28652857245bef SHA-256: 6f8217da3961e9e2bc90fffda9311d279338654af02d3c57d3efb0e09ac04e05
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, with many URLs pointing to compromised or disposable hosting. While no scripts were directly extracted, the nature of the links suggests a phishing or malware distribution attempt, likely initiated via a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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 http://xageunion.com/userfiles/file/51617629021.pdf In PDF document text
    • https://yptea.com/data/fckeditor/files/5584891559.pdfIn PDF document text
    • https://tidurmalam.com/contents/files/ligazekujaz.pdfIn PDF document text
    • https://defi128.phpascal.com/userfiles/files/55173559729.pdfIn PDF document text
    • https://888nv.ru/userfiles/file/bewukobajujuvisu.pdfIn PDF document text
    • https://greenlakepaint.com/ckfinder/userfiles/files/54457909228.pdfIn PDF document text
    • http://vishwkarmaenterprises.com/webroot/img/userfiles/files/kijupekebirupa.pdfIn PDF document text
    • http://happinessgown.com/upload/users/files/zitelovumidof.pdfIn PDF document text
    • http://hyeminshop.com/DATA/files/paninorukexut.pdfIn PDF document text
    • http://markone-tools.com/upload/files/62934815074.pdfIn PDF document text
    • http://klemanpince.hu/files/file/67786817228.pdfIn PDF document text
    • http://cctechlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/fiseje.pdfIn PDF document text
    • http://18554080.com/userfiles/file/16904733415.pdfIn PDF document text
    • https://samoinstitute.mn/uploads/assets/file/19788193176.pdfIn PDF document text
    • http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/161305852e6d61---petel.pdfIn PDF document text
    • https://web-sila.ru/wp-content/plugins/super-forms/uploads/php/files/912afac846e2780b347e3383aa61ace2/godaso.pdfIn PDF document text
    • http://thepokeluau.com/uploads/files/60728725850.pdfIn PDF document text
    • https://acconpriti.com/ckfinder/userfiles/files/25811896911.pdfIn PDF document text
    • https://howardsteeves.com/wp-content/plugins/super-forms/uploads/php/files/a86f4e2adb90967005a31f4bd907fea6/kikitejof.pdfIn PDF document text
    • https://kolegium.inaheart.org/upload/files/28657496576.pdfIn PDF document text
    • http://veraschwemmle.de/fckdata/file/pepovifojar.pdfIn PDF document text
    • http://gostium.com/wp-content/plugins/formcraft/file-upload/server/content/files/161311fc30dbdf---nawilederupikajisutif.pdfIn PDF document text
    • http://aiaato.com/FileData/ckfinder/files/20211001_78429A18CBCEB232.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=curly+haired+dogs+smallPDF link annotation
    • http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/16153923d765bc---rizikenajudulibixotefe.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_off0000c47f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC47F 10740 bytes
SHA-256: bd39b27696a5b43003c9c3ec98cf01c919909f8f2430064813d0b1d0c541f76a
font_01_sfnt_off0000dcf3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCF3 17596 bytes
SHA-256: fd716f7c96c2c190ca79e91d2aa5b016d700cef54342e5ec685cb7e54068da76
font_02_sfnt_off00010aa1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AA1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.