Malicious PDF — malware analysis report

Static analysis result for SHA-256 c65f3a5902c328b2…

MALICIOUS

PDF

78.7 KB Created: 2021-09-16 11:32:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: f2aa855b4b88bbde9413c09e23bb410f SHA-1: b2f2d095a7e1e62663fa875e95c1141aba8b7413 SHA-256: c65f3a5902c328b27cc7d26196b796e90aa49351357df2905d9613fada027237
126 Risk Score

Malware Insights

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

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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://oniceh.ru/uplcv?utm_term=hacks+for+android+no+root PDF link annotation
    • https://sergiomauri.com/images/file/28774458074.pdfIn PDF document text
    • http://puzynowska-kancelaria.com/userfiles/file/rebavov.pdfIn PDF document text
    • https://gpagroup.in/wp-content/plugins/formcraft/file-upload/server/content/files/1613854eb66085---kejenekodunep.pdfIn PDF document text
    • http://wuyioutdoor.com/userfiles/file/zavezileg.pdfIn PDF document text
    • http://sro52.ru/uploads/files/tefedibusananakosiwitem.pdfIn PDF document text
    • http://usa-ex.com/images/blog/file/76082794298.pdfIn PDF document text
    • http://www.cafeinca.com/img/public/contenido/file/84069594041.pdfIn PDF document text
    • http://emke.hu/uploads/ckfinder/userfiles/files/20446962973.pdfIn PDF document text
    • https://3eyamaichi.com/upload/ckfinder_temp/files/20210910142322.pdfIn PDF document text
    • http://baocaosudanang24h.com/uploads/image/files/tusezafu.pdfIn PDF document text
    • http://bjsixiang.com/jingkelun/userfiles/files/20210912100217.pdfIn PDF document text
    • https://butyfarm.mm520.net/userfiles/files/50538507152.pdfIn PDF document text
    • https://home-consult.lu/userfiles/files/14614040102.pdfIn PDF document text
    • http://dkind.net/userData/board/file/wised.pdfIn PDF document text
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614083fa1f1d9---20338250452.pdfIn PDF document text
    • http://lemonsport.hu/upload/file/dovedisujawatafupexanez.pdfIn PDF document text
    • https://www.educationsexuelle-ecole.ch/ck/ckfinder/userfiles/files/82552485751.pdfIn PDF document text
    • http://flagrant-desir.com/userfiles/file/36874109767.pdfIn PDF document text
    • https://eirai.org/editor/ckfinder/userfiles/files/tolupakebidemo.pdfIn PDF document text
    • http://fuerst-architects.com/uploads/file/94980236963.pdfIn PDF document text
    • http://dpholding.ru/uploads/files/mepemumafeze.pdfIn PDF document text
    • http://oshcongregation.com/userfiles/file/daxawivogifaxunarubodebus.pdfIn PDF document text
    • https://vildmarksjagt.dk/userfiles/file/17797657766.pdfIn PDF document text
    • http://www.stadion-zarya.ru/ckfinder/userfiles/files/18920549090.pdfIn PDF document text
    • http://huyndaicaudien.com/upload/files/36113496250.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d23b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD23B 16856 bytes
SHA-256: f1570abc381dcfa760890b83cf33911bece09409c807a18dfff8be192345a9fe
font_01_sfnt_off0000fdfc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDFC 10376 bytes
SHA-256: 6660830b27d8837cb000501694bb3c8cf39da54cbe29ba9a2843a4cc08d6d283
font_02_sfnt_off00011590.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11590 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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