Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7664ae563fb0590…

MALICIOUS

PDF

138.2 KB Created: 2021-04-04 03:53:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 94266c636d32d156710823b91cdb3783 SHA-1: c5e49027d80fbb1feaa2ab3f52d215daad98ae80 SHA-256: d7664ae563fb0590ac25ffafcf5a8815eecb889e6d73164e5d698c8b4c548516
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains embedded URLs that redirect to external websites, with one notable URL being https://jacksth.ru/award?keyword=bharat+ka+map+pdf. Heuristics indicate the PDF is part of a link farm on disposable hosting, suggesting a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or serving a malicious payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9931

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jacksth.ru/award?keyword=bharat+ka+map+pdf PDF link annotation
    • http://xakuneferufilew.iblogger.org/navien_tankless_water_heater_troubleshooting.pdfIn PDF document text
    • https://cdn.sqhk.co/waxolulum/UjehiKz/87167005011.pdfIn PDF document text
    • http://pejokepi.mywebcommunity.org/xupepatagejifamaw.pdfIn PDF document text
    • http://xofinipi.iblogger.org/vunadenelivo.pdfIn PDF document text
    • https://cdn.sqhk.co/xetilibul/hbwhdHj/mineral_wells_state_park_weather.pdfIn PDF document text
    • https://cdn.sqhk.co/gokarunedod/BhbLcgi/the_king_of_lion_movies.pdfIn PDF document text
    • http://kexolifowuj.medianewsonline.com/pevidaledopu.pdfIn PDF document text
    • http://xizadewakali.iblogger.org/basic_statistics_worksheets.pdfIn PDF document text
    • http://punalavivex.22web.org/blood_type_a_diet_food_list.pdfIn PDF document text
    • https://cdn.sqhk.co/disegivoji/XkYnXZB/migamatanukawizid.pdfIn PDF document text
    • https://cdn.sqhk.co/riketumes/cxSijh9/fonijemokolamoberipo.pdfIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/wefadep/15577530628.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ab6cefa-85b2-4981-ab36-7fdad258cbfa/17321920900.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0d44561-43a3-4945-b390-8dc3671574a1/my_kenmore_washer_will_not_drain_or_spin.pdfIn PDF document text
    • http://buvelijixuzumu.epizy.com/how_to_do_penny_stocks_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/11ba8827-c6e1-4f68-ab0a-0a2d5108674a/89009469437.pdfIn PDF document text
    • http://davofunup.onlinewebshop.net/wisusamon.pdfIn PDF document text
    • http://zetulinug.rf.gd/10384926322.pdfIn PDF document text
    • https://s3.amazonaws.com/pazerogasarinu/best_civilization_games_for_android.pdfIn PDF document text
    • http://posikin.myartsonline.com/r_basics_for_beginners_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/531eb297-2c25-46d4-89f8-1e949d13892a/85308444453.pdfIn PDF document text
    • http://lesadesar.rf.gd/gukopozazutajiwometoziten.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/84133e0d-ee8a-4d61-8c2d-fdddb1a1b14e/zunapu.pdfIn PDF document text
    • https://s3.amazonaws.com/fokapikow/talking_to_your_spiritual_guide.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://scripts.sil.org/OFLIn PDF document text
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_007_off0001dd30.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1DD30 20732 bytes
SHA-256: 3b8404e9a56342b313c40561a650fd2a94fe97bb2c54145c31a9f9bf0c85ea70
font_00_sfnt_off00019374.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19374 4592 bytes
SHA-256: d562eae61b7da05a41f2861f082a138121eb0714effc3bb07dadef52e9500571
font_01_sfnt_off0001a2fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A2FC 3720 bytes
SHA-256: d0c9e33916e9e64e42e31bcf0d345f6c2fcd41735b1a34df0119bd0eb1094281
font_02_sfnt_off0001ae5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AE5F 9564 bytes
SHA-256: f9c083b07235148e6df4d6c9994cc74ed48b1ca6880a2143fc6125c96259f8c6
font_03_sfnt_off0001cf2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CF2F 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c