Malicious PDF — malware analysis report

Static analysis result for SHA-256 b19b9167251ca582…

MALICIOUS

PDF

82.3 KB Created: 2021-09-13 11:21:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: edc234c75938e7716b0e17e25326d0d7 SHA-1: b9f4d6fd133bb19dc66a9945247d2da799820005 SHA-256: b19b9167251ca5823765c62ded7d0662823a1a186f997a0ebd53f1f6f184db2a
146 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of embedded URIs, many of which point to disposable domains or raw IP addresses, indicating a link farm designed to distribute further malicious content. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggests this is a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://criollo-cocoa.com/userfiles/file/bujeroranagativikoditulun.pdf In PDF document text
    • https://dijitalsanat.link/upload/files/vuzizonoxomoribe.pdfIn PDF document text
    • http://mail.teleserviciomalaga.com/ckfinder/userfiles/files/46791184358.pdfIn PDF document text
    • https://philly.drinkpoint.com/uploads/files/9961989864.pdfIn PDF document text
    • https://weishinclinic.com/uploads/files/202109020659113435.pdfIn PDF document text
    • http://innotec-industrie.be/userfiles/file/89250437934.pdfIn PDF document text
    • http://jngf.cn/files/file/37253621039.pdfIn PDF document text
    • http://drcleancenter.com/uploads/files/202109061712049517.pdfIn PDF document text
    • http://moveworldtogether.com/datas/files/43641146025.pdfIn PDF document text
    • http://audyt.rowerowaszkola.pl/imgturysta/files/ripuriwunopawumatita.pdfIn PDF document text
    • https://tpijobportal.com/ckeditor/ckfinder/userfiles/files/56271637235.pdfIn PDF document text
    • http://allegroescrow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131d21296951---68403440134.pdfIn PDF document text
    • https://quatcongnghieput.com/uploads/files/56777112803.pdfIn PDF document text
    • https://sportcity.bg/webroot/img/content/files/lesepikoxawev.pdfIn PDF document text
    • https://gamepinleri.com/calisma2/files/uploads/92945309005.pdfIn PDF document text
    • http://al-bandak.com/userfiles/file/73998423458.pdfIn PDF document text
    • http://www.companyforte.com/imagenes/editor/file/kewupodulagopifitixi.pdfIn PDF document text
    • http://dragonera.cn/admin/userfiles/file/reramowipumazigasemijuwi.pdfIn PDF document text
    • https://matras-matrasych96.ru/admin/ckfinder/userfiles/files/lodekebumokakosekisuv.pdfIn PDF document text
    • http://we2meeting.com/ckfinder/userfiles/publics/files/tosimipopudugazobofafux.pdfIn PDF document text
    • http://mama-care.com/UserFiles/file/rejujamilesodip.pdfIn PDF document text
    • http://140.121.125.49/ckfinder/userfiles/files/20210903_235403.pdfPDF link annotation
    • http://avanti-kuhni.ru/upload/files/vegelumag.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=tienda+para+aplicaciones+android+gratisPDF 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_off0000dc46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC46 10652 bytes
SHA-256: 94b08e555b296eb5f520a5d05d45afb47972cef2a5376af6accf05d7df8b98a8
font_01_sfnt_off0000f48a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF48A 18584 bytes
SHA-256: d0afbefb02befcee045a2588828763e4d6cce1b11bb9b4f55456253c2bc25a84
font_02_sfnt_off000123d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123D7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1