Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebb6a6c0f464272f…

MALICIOUS

PDF

71.9 KB Created: 2021-09-23 10:28:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: ce470b779696daca84a13a759116499b SHA-1: 92ba7da98f735fe4429f0ccd5bddec3820cad8d3 SHA-256: ebb6a6c0f464272f263efff631be7d7c9a6eb9775611c33fef14ab35648f3a4f
126 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, presenting numerous URLs that likely lead to further malicious content or downloads, disguised as game-related files. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggests a malicious intent to distribute harmful files through a network of disposable domains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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 http://grafiport.com/userfiles/file/31977939545.pdf In PDF document text
    • http://isagenixmakessense.com/ckfinder/userfiles/files/sojedubokab.pdfIn PDF document text
    • http://mtsskzy.com/userfiles/file/23590698153.pdfIn PDF document text
    • http://xinghui.co/upload/ckimg/files/202109062256591934.pdfIn PDF document text
    • https://longhoang.vn/upload/files/98463964594.pdfIn PDF document text
    • http://witnesstherealist.com/wp-content/plugins/super-forms/uploads/php/files/c949b09927410a52a56ac7ae0fff1a9f/97501444104.pdfIn PDF document text
    • http://work4shop.cz/userfiles/file/47689427223.pdfIn PDF document text
    • http://hotelalbicia.com/userfiles/file/pijukegog.pdfIn PDF document text
    • http://kaupa.cz/userfiles/file/sozinavafagobexinurafoga.pdfIn PDF document text
    • https://biholka.cz/uploades/userfiles/file/27893627248.pdfIn PDF document text
    • http://sherwoodchambergolf.org/ckfinder/userfiles/files/16297777984.pdfIn PDF document text
    • http://hpworld.hu/data/pic/Image/file/2217221142.pdfIn PDF document text
    • https://psg66.ru/admin/ckfinder/userfiles/files/zorexik.pdfIn PDF document text
    • http://greenhere.cn/upload/ckimg/files/202109061157089267.pdfIn PDF document text
    • http://fotosvatba.net/userfiles/file/ziduzakesalotemotirikedul.pdfIn PDF document text
    • http://gediklimakinahidrolik.com/resimler/files/poxunugusiboxit.pdfIn PDF document text
    • https://ezastupitelstvo.sk/editor_uploads/system/files/9251216817.pdfIn PDF document text
    • http://aspbae.org/userfiles/file/89341197037.pdfIn PDF document text
    • https://mudrun.com/home/mud/public_html/ckfinder/userfiles/files/pedakaze.pdfIn PDF document text
    • http://luxmeterthai.com/ckfinder/userfiles/files/nosovenir.pdfIn PDF document text
    • https://alkathirilaw.com/userfiles/files/dusuzelideto.pdfIn PDF document text
    • http://ichieh.tw/uploads/files/202109081451138468.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=download+dragon+ball+xenoverse+for+ppssppPDF link annotation
    • 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_off0000b79e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB79E 16024 bytes
SHA-256: bf3404cad4d9c4f721df27a3fa189761bb5916f59a510e09df40c7d4f6bf6ef7
font_01_sfnt_off0000e0c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0C5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f8dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8DC 10880 bytes
SHA-256: feb5ce520ec2bc66f984928daab940504053d50c33c962ddc5ea63c6fcdbf732

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