Malicious PDF — malware analysis report

Static analysis result for SHA-256 97a1678b5fff0b8f…

MALICIOUS

PDF

76.8 KB Created: 2021-03-06 22:35:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 7172ec78fe998ab0325b132a85f6e8a4 SHA-1: ef0db56a3e52944fc8c4bb0439e2173f20b3e626 SHA-256: 97a1678b5fff0b8f9b3afdfb8b9ee1d766d1c6ba9dbd9030b92efbba39343de1
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 0.9998

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://xezojetit.ru/strik?utm_term=bissell+powerforce+bagless+upright+vacuum+manual PDF link annotation
    • http://santecmb-sarl.com/advertising_agency_around_metro_manila2xtwb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464082/normal_6032a7a52cee6.pdfIn PDF document text
    • https://wemakevarovafa.weebly.com/uploads/1/3/4/6/134636541/b2526.pdfIn PDF document text
    • http://dommasters.site/defibtech_ddu-100_service_manualu1szx.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447280/normal_601987acd283f.pdfIn PDF document text
    • http://zinusefubowewet.22web.org/liparefamufudikemoz.pdfIn PDF document text
    • http://cheatyou.site/the_enjoyment_of_music_12th_edition_freehv2wf.pdfIn PDF document text
    • https://zekorawuj.weebly.com/uploads/1/3/4/8/134862422/2213195.pdfIn PDF document text
    • https://tirasuvemesamu.weebly.com/uploads/1/3/4/6/134672388/lubonesomolorikerade.pdfIn PDF document text
    • https://misutinulil.weebly.com/uploads/1/3/1/4/131407711/8213475.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xujiwusa.epizy.com/12791674853.pdfIn PDF document text
    • http://jodofinefurow.rf.gd/electronic_battleship_game_pieces_names.pdfIn PDF document text
    • https://s3.amazonaws.com/purawuma/fuxeroperabelomodidelubi.pdfIn PDF document text
    • http://tenimogutoteme.epizy.com/24115113582.pdfIn PDF document text
    • https://s3.amazonaws.com/wixanarer/55274949999.pdfIn PDF document text
    • http://fazetotunoju.epizy.com/jonutusavukakaruworelad.pdfIn PDF document text
    • http://moxurux.epizy.com/label_prokaryotic_cell_worksheet.pdfIn PDF document text
    • http://rewosawobew.rf.gd/38287733701.pdfIn PDF document text
    • https://s3.amazonaws.com/bupijila/spotify_premium_gratis_2019.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED14 5768 bytes
SHA-256: e5a637e871906e4cae7593143080597c63f0e0170b4f2c4f57756259e13c1f99
font_01_sfnt_off000100b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100B1 10732 bytes
SHA-256: 85312b6bf68a5becc5ca84d4ea7e88be03e739b1b12b9d2dc808a1d36241c6fb