Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c68bb7c304cc0a9…

MALICIOUS

PDF

76.9 KB Created: 2021-03-04 13:48:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 2f4f13de0e16ed00cdcabc41b17ee8d4 SHA-1: 15b5cecd6da38830a09ff5dd5b72ebcafdccc6be SHA-256: 6c68bb7c304cc0a98a503eee52d4e08faa8bb2207a7721f4b08742d74c3e6c38
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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://soxebez.ru/wix?keyword=appen+web+search+evaluator+test+answers PDF link annotation
    • http://vabetovopux.66ghz.com/nvidia_shield_tv_usb_drive_format.pdfIn PDF document text
    • https://gibiboxovozigux.weebly.com/uploads/1/3/4/7/134722082/suwipapeja.pdfIn PDF document text
    • https://nekazexupogufeg.weebly.com/uploads/1/3/1/4/131454238/nojasixejupanuxeni.pdfIn PDF document text
    • http://bet-info.ru/bestwap_bhojpuri_dj_song_2018usf9a.pdfIn PDF document text
    • http://nowefatot.22web.org/95540779117.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425726/normal_602db093c1e82.pdfIn PDF document text
    • https://ropumalopiku.weebly.com/uploads/1/3/4/6/134613257/zesikiva_gesuvamib.pdfIn PDF document text
    • http://xuxisozolawub.22web.org/form_d_under_bonus_act.pdfIn PDF document text
    • https://tadomowiwelam.weebly.com/uploads/1/3/4/7/134744739/tekebegufo.pdfIn PDF document text
    • http://twitter-center.com/qu_es_la_diferencia_entre_promocin40vlc.pdfIn PDF document text
    • http://woxemezamuj.iblogger.org/sainik_school_balachadi_admission_form_2019-_20.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416502/normal_5fd03b6f6acb9.pdfIn PDF document text
    • http://sollabs.xyz/cinderella_2015_english_subtitles_free0swdt.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370302/normal_5ff42da8014cb.pdfIn PDF document text
    • http://fibufadal.iblogger.org/board_exam_date_sheet_2020.pdfIn PDF document text
    • http://kulovemalam.22web.org/77533946547.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/9adffa37-b2b1-4cdc-9cd1-4daf6482adf2/interior_design_course_in_delhi_part_time.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c94cde4-6129-4c62-9b94-3a3d73f72ed3/tilava.pdfIn PDF document text
    • http://balubusepebibi.rf.gd/wowosisudixewi.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_off0000f07c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF07C 5304 bytes
SHA-256: ea7f2be620111ba3fdb5ee204a7f767c863a93a02e26dfe912aaacb4e61ccccc
font_01_sfnt_off0001028d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1028D 10296 bytes
SHA-256: 68281e68930104ce1de04c0a8c93b21ac288251800e2a782105980478ff4fde5

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