Malicious PDF — malware analysis report

Static analysis result for SHA-256 07fea650612c8ed2…

MALICIOUS

PDF

71.1 KB Created: 2021-01-22 06:43:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 08728295eea8237aeb0a024b885eab3f SHA-1: efcc970a39d7deaa3f84c3a4aae6b85d8cf7d0a5 SHA-256: 07fea650612c8ed2a8971b7516ce6514450df8493022c64c546945195e0eee85
126 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external URIs, many of which point to disposable hosting, suggesting a link farm or phishing lure. The presence of external URIs within the PDF document body, combined with the heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM', strongly indicates an attempt to redirect users to potentially harmful websites for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://druttle.ru/123?utm_term=scarlet+ibis+spanish+pdf PDF link annotation
    • https://site-1172077.mozfiles.com/files/1172077/bully_android_versi_1__0__0__17.pdfIn PDF document text
    • http://sojuvofud.22web.org/japanese_anime_movie_480p.pdfIn PDF document text
    • https://site-1178138.mozfiles.com/files/1178138/dunia_games_pubg.pdfIn PDF document text
    • https://taxesewisozigif.weebly.com/uploads/1/3/5/3/135394589/6b8e25.pdfIn PDF document text
    • http://pojuded.22web.org/adobe_acrobat_reader_dc_64_bit.pdfIn PDF document text
    • https://site-1178549.mozfiles.com/files/1178549/download_stick_tennis_mod_apk.pdfIn PDF document text
    • https://site-1176664.mozfiles.com/files/1176664/space_shooter_3d_juego_gratis.pdfIn PDF document text
    • http://vatemuredaxusob.22web.org/vidya_vox_be_free_mp4_video.pdfIn PDF document text
    • https://site-1197381.mozfiles.com/files/1197381/63012390510.pdfIn PDF document text
    • https://satukaxel.weebly.com/uploads/1/3/5/3/135346341/2147518.pdfIn PDF document text
    • https://site-1168377.mozfiles.com/files/1168377/bisanadidaj.pdfIn 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
    • http://voxosejak.rf.gd/19806790426.pdfIn PDF document text
    • http://gegavolaful.epizy.com/61232045468.pdfIn PDF document text
    • http://bibirosomuxir.epizy.com/uc_browser_for_pc_windows.pdfIn PDF document text
    • http://towirasoruxapob.rf.gd/ropamokexazonobesutopo.pdfIn PDF document text
    • http://rufofexejojar.epizy.com/21629370199.pdfIn PDF document text
    • http://gujomodezeroj.epizy.com/zibukanowaraxow.pdfIn PDF document text
    • http://vixugow.epizy.com/kakezekovusisugujokujo.pdfIn PDF document text
    • http://kupavojos.epizy.com/work_time_tracker_spreadsheet.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c981.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC981 5164 bytes
SHA-256: 8f5d9a10f145c8624cd1f100646a1c223d70bf9e4cba2113978b0176e95286aa
font_01_sfnt_off0000daea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAEA 11692 bytes
SHA-256: 412047074894bb10010fcd5620e5c3dabfdbb1316d06037b8a903b3ba5373625
font_02_sfnt_off00010130.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10130 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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