Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7a8afc26599c1ff…

MALICIOUS

PDF

83.5 KB Created: 2021-09-14 10:22:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: ffa1775f8e46ba1e9c2f782468c80028 SHA-1: a5b98ced50c19febc73dd57b187c11787ade9379 SHA-256: c7a8afc26599c1ff87bfbdd2dba5ca920e95677928aabfb96f19c7698604de81
156 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing or trojan. It contains numerous embedded URLs that point to compromised websites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of 'utm_term' parameters in some URLs indicates a potential phishing or scam campaign.

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=ez+money+mod+apk PDF link annotation
    • https://mayphoviet.com/media/ftp/file/39403490692.pdfIn PDF document text
    • https://www.groupe-coelho.fr/ckfinder/userfiles/files/zarifo.pdfIn PDF document text
    • https://www.auto-ecole-rive-droite.fr/ckfinder/userfiles/files/45744625447.pdfIn PDF document text
    • http://tv-kitchen.ru/files/files/96369916125.pdfIn PDF document text
    • https://marbeyoyun.com/calisma2/files/uploads/67798811434.pdfIn PDF document text
    • https://trichynext.com/wp-content/plugins/super-forms/uploads/php/files/30006ea7dc324c0abe21eea9b205453f/lixetozodekiworama.pdfIn PDF document text
    • https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/d5o9p7hqv51htulepkis16i7o2/93916083384.pdfIn PDF document text
    • https://pecsikult.hu/files/file/27324913404.pdfIn PDF document text
    • http://golden-candies.ru/webroot/files/files/fasiwaf.pdfIn PDF document text
    • https://batdongsandothanh.vn/luutru/files/70246252154.pdfIn PDF document text
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/161332903f2e72---kiruzasevosife.pdfIn PDF document text
    • http://cellesekorea.com/ckupload/files/30127529171.pdfIn PDF document text
    • https://dienhoanghean.com/upload/ck/files/1853871580.pdfIn PDF document text
    • https://powermailer.in/userfiles/file/nudufufuwufoju.pdfIn PDF document text
    • http://about-dogs.ru/upload/file/86082338425.pdfIn PDF document text
    • http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613df1bbd20e9---64812241302.pdfIn PDF document text
    • http://hangtatmj.com/userfiles/xuwilifusag.pdfIn PDF document text
    • https://gulfcans.com/home/madarmun/public_html/gulfcans/images/bulk_images/files/tapizuxinodigusex.pdfIn PDF document text
    • http://nkmate.com/FileData/ckfinder/files/20210912_DA3B634127D26844.pdfIn PDF document text
    • http://autoneza.cz/UserFiles/File/60343078903.pdfIn PDF document text
    • https://event-connections.net/wp-content/plugins/formcraft/file-upload/server/content/files/16133244d2508a---lefixoxulugagav.pdfIn PDF document text
    • http://vizugy.hu/uploads/files/files/90386401612.pdfIn PDF document text
    • http://lamexmarket.com/uploads/files/92060781344.pdfIn PDF document text
    • https://alternativecarrepair.nl/userfiles/file/3384099212.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_off0000e05b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE05B 19008 bytes
SHA-256: c8f8606949cdceee9281e3c67bb8f2636242e09e204813ecde52c22efa07a9ce
font_01_sfnt_off0001113d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1113D 10296 bytes
SHA-256: 1e1bc9f10399be7749ac07b4e0b18f0b095b5d2301d94221354f0d95d31c5a54
font_02_sfnt_off0001286d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1286D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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