Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4908003453ddacf…

MALICIOUS

PDF

85.6 KB Created: 2021-09-01 13:07:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-01
MD5: 44b6aef7bd8a9172f41680c40b24a2d3 SHA-1: 7ccce28c83e663eae266e79c839906dab1382497 SHA-256: a4908003453ddacf406efab851d55f6d1c65fd4bd14ed4107f328f9cecf8d655
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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=annotate+images+for+ai+answers PDF link annotation
    • http://studiodispirito.it/userfiles/file/misoremodojagajobetimare.pdfIn PDF document text
    • https://portalbime.com/UploadedFiles/New/file/34200572060.pdfIn PDF document text
    • http://www.caslyn.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16072d7a72d82e---86011992279.pdfIn PDF document text
    • http://orderkai.com/uploads/files/45374339783.pdfIn PDF document text
    • http://kutyasturak.hu/images/files/wotejudewani.pdfIn PDF document text
    • https://sdyh.gr/wp-content/plugins/super-forms/uploads/php/files/afjhomiphndk87jdna1g44vht4/vajez.pdfIn PDF document text
    • https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/mld47ccq1d0pq0giqdblkkjqpa/gemepejilufip.pdfIn PDF document text
    • http://panhongbo.com/ckfinder/userfiles/site_eachfun_com/files/54137463066.pdfIn PDF document text
    • http://ajivikafinance.com/userfiles/file/fodiwibubelan.pdfIn PDF document text
    • http://ugrctrani.it/userfiles/files/vovumamotunole.pdfIn PDF document text
    • https://mavismanagement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abf28d01d88---wixesutufazofidiva.pdfIn PDF document text
    • http://graphicon.hu/wp-content/plugins/formcraft/file-upload/server/content/files/160a0b846ec50a---dorakema.pdfIn PDF document text
    • http://bjallstar.com/upload/file/798064030.pdfIn PDF document text
    • https://flycam.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16088724edcb10---budunekojinonolidozu.pdfIn PDF document text
    • http://hilltop1976.com/clients/24685/File/27948993454.pdfIn PDF document text
    • https://autoteam.in/ckfinder/userfiles/files/muwepereridipe.pdfIn PDF document text
    • http://aiswaryamatrimonials.com/fck_uploads/file/vizevenamidodudaxitopigew.pdfIn PDF document text
    • http://kfbi.ru/content/file/muzanagutawukuxigu.pdfIn PDF document text
    • http://buzmakov-ua.ru/admin/ckfinder/userfiles/files/gomirijetef.pdfIn PDF document text
    • https://member-amz-seller-system.de/wp-content/plugins/super-forms/uploads/php/files/86cb4bcd21fd181fe2940580338a077c/79427933427.pdfIn PDF document text
    • https://thietbiytedaibao.com/media/files/kanawuj.pdfIn PDF document text
    • https://siphouse96.com/wp-content/plugins/super-forms/uploads/php/files/31f5be6e727ef44faa91c1888c277319/fupetem.pdfIn PDF document text
    • http://aaaexpressheating.com/userfiles/file/9675421934.pdfIn PDF document text
    • http://flyingkirin.com/uploadfiles/file/181659035136.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_off0000e94c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE94C 10576 bytes
SHA-256: c21de459a7ad8fec6b68a2afe67ab870909cd68e02c0832cc4c6981475ee98e0
font_01_sfnt_off0001018c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1018C 17912 bytes
SHA-256: 61602dec5fb3f60cad6d6a5011e6dcc29d26bc024fe41540c760c0903e05e402
font_02_sfnt_off0001306a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1306A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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