Malicious PDF — malware analysis report

Static analysis result for SHA-256 70d6c6a6067141f3…

MALICIOUS

PDF

83.3 KB Created: 2021-09-10 21:53:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-22
MD5: ff75d2244b497213c7d445752a0bbdbb SHA-1: c6b212f1f35f411b68d0acb326ed0b14c8a86410 SHA-256: 70d6c6a6067141f38ea9f456a7db917fe92a08055391170db4fe9dd428859e09
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 0.9912

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://philabc.ru/uplcv?utm_term=burn+your+bra+movement PDF link annotation
    • https://kcss.hu/korosi/userfiles/file/xulimoranijumanubewemuju.pdfIn PDF document text
    • https://pinpointfeedtech.com/ckfinder/userfiles/files/59706821339.pdfIn PDF document text
    • http://embeddedhr.com/ckfinder/userfiles/files/26406795348.pdfIn PDF document text
    • https://wintechindia.in/ckfinder/userfiles/files/39524805198.pdfIn PDF document text
    • http://turksebruiloften.nl/userfiles/file/55238514634.pdfIn PDF document text
    • http://pnlestari.com/visitbali/image/files/579594923.pdfIn PDF document text
    • https://infravoip.com/wp-content/plugins/super-forms/uploads/php/files/9ff19b152ed0ceaec38327b9dfa436ca/75070644560.pdfIn PDF document text
    • http://girisimcilikproje.com/resimler/files/35091760576.pdfIn PDF document text
    • https://atlas-consulting.ro/fckeditor/fisiere/file/zevinokavevuvivumosebuvis.pdfIn PDF document text
    • http://aa-nusd.jp/jeluwafapesowigedawuf.pdfIn PDF document text
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612fd9ca1c38b---lotajakewarexi.pdfIn PDF document text
    • http://e-skala.pl/userfiles/file/46652173340.pdfIn PDF document text
    • http://zssadkowice.pl/pliki/17398248334.pdfIn PDF document text
    • https://bya-ingenieria.com/ckfinder/userfiles/files/dowoxudetasutopi.pdfIn PDF document text
    • http://dailyxedayhang.com/userfiles/files/jekixolabubiminoxamovus.pdfIn PDF document text
    • https://www.icicle-mountaineering.ltd.uk/ckfinder/userfiles/files/somulopo.pdfIn PDF document text
    • http://timavoshipsupply.it/userfiles/file/tuxadovivojezasubilava.pdfIn PDF document text
    • http://rapet.hu/files/leburizufevog.pdfIn PDF document text
    • https://yp05.com/_UploadFile/Images/file/puwaj.pdfIn PDF document text
    • https://bellcera.60km.com/upload/files/xufosaxurewav.pdfIn PDF document text
    • http://thaisomboonautopart.com/userfiles/files/5692636023.pdfIn PDF document text
    • http://oikoscoccatoarchitettura.com/userfiles/files/15947526688.pdfIn PDF document text
    • http://ebiocell.com/uploadfile/file///2021090711182269.pdfIn PDF document text
    • http://huiking.cn/uploads/file/091338514683.pdfIn PDF document text
    • http://greenmodels.ru/uploads/files/nanokede.pdfIn PDF document text
    • https://paroles-vives.com/ckfinder/userfiles/files/zolepoweluselubabulalur.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_off0000e06c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE06C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f883.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF883 10436 bytes
SHA-256: 2de8eb2704588bd4808ea08ced8a7d7d01201122b6a2c567b5124a4f865bacb6
font_02_sfnt_off00011043.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11043 18128 bytes
SHA-256: 6c540dc8819c615be98d5d7d769eec723fa62bcda08b897cf07dc86d003f0fe7