Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e2a4559b4180f99…

MALICIOUS

PDF

86.1 KB Created: 2021-09-11 19:15:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: fa660b479d5788c2fe40f3ef5f24feec SHA-1: bdf3d68bbb3248d8390e4970fc6ff19de2bd20ee SHA-256: 6e2a4559b4180f9944fc49e497e5bdd954ae8de70dd4d004574f7a50fad26efe
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, many pointing to suspicious domains, and one heuristic specifically identifies it as a link farm on disposable hosting. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the detection suggest it's likely a phishing or malware distribution lure, possibly leveraging JavaScript for execution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://www.limratechnologies.net/wp-content/plugins/formcraft/file-upload/server/content/files/16132fde3b5b95---dakisolubetar.pdf In PDF document text
    • http://unibox.lv/files/text/wovakaseneruv.pdfIn PDF document text
    • http://neodentpetrosino.it/userfiles/files/71050196892.pdfIn PDF document text
    • http://kenhuffbuilders.com/userfiles/file/72654653371.pdfIn PDF document text
    • https://frigosztufi.ro/ckfinder/userfiles/files/82345960728.pdfIn PDF document text
    • https://catequesisnavarra.org/guiarte_userfiles/files/xugowujojagu.pdfIn PDF document text
    • http://asea-admin.com/_userfiles/file/20210910055016.pdfIn PDF document text
    • http://stomerijindex.nl/images/uploads/duruzinodedarusuje.pdfIn PDF document text
    • http://xn--42cfa4ewb0a0b3fwh.com/imageupload/files/15406573486.pdfIn PDF document text
    • http://ketphatthinh.vn/upload/files/2091927206.pdfIn PDF document text
    • http://arcstema.com/userfiles/files/kibesapezuvunatenenapit.pdfIn PDF document text
    • http://alfavs.eu/userfiles/file/lekejipotazuw.pdfIn PDF document text
    • https://pensiuneaselina.ro/userfiles/file/46752063937.pdfIn PDF document text
    • http://unite-chem.cn/upload/files/96965349757.pdfIn PDF document text
    • https://beruanglucu.com/contents/files/69469557333.pdfIn PDF document text
    • http://densayhongngoai.com/uploads/userfiles/file/safapibuvijetowadi.pdfIn PDF document text
    • http://pokewaveanaheim.com/uploads/files/27180506890.pdfIn PDF document text
    • https://people11people.com/uploads/File/rurinotuvazedilexuruwov.pdfIn PDF document text
    • http://italianopizzeria-pg.com/uploads/files/poxigafokagu.pdfIn PDF document text
    • https://zlato-eu.cz/upload/files/46971332332.pdfIn PDF document text
    • https://atlanticcompact.org/userfiles/files/tejixedagise.pdfIn PDF document text
    • https://gpagroup.in/wp-content/plugins/formcraft/file-upload/server/content/files/1613854eb66085---kejenekodunep.pdfIn PDF document text
    • http://szerecsengyogyszertar.hu/editor_up/55996116078.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=how+to+erase+snapchat+filters+on+picturesPDF 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_off0000e840.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE840 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010057.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10057 10756 bytes
SHA-256: 8e408cf5e7d1d10a75c7caf1cacd734f61f6ed7e5626c9003ea127ae7dd31c54
font_02_sfnt_off00011907.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11907 18928 bytes
SHA-256: 9179d02900f2777cba05fe806c4a3eccfc45950287ab798e00aaa317a4cca018