Malicious PDF — malware analysis report

Static analysis result for SHA-256 2fc614a5bfd26d96…

MALICIOUS

PDF

92.4 KB Created: 2021-04-29 12:04:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: f6f2ac0c0f789f2800138dee2429f8ff SHA-1: 3f0f50b5e174ea78c83b4287986556a162f83447 SHA-256: 2fc614a5bfd26d96a37f5385bfef0eead9036a69c19242b2949aadb5b52dc14e
134 Risk Score

Malware Insights

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

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 and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 6

  • 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.
  • 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://nipisod.ru/strik?utm_term=iti+engineering+drawing+mcq+book+pdf PDF link annotation
    • http://sodaapp.pro/what_is_agile_methodology_in_simple_wordsct9ke.pdfIn PDF document text
    • https://cdn.sqhk.co/loxowopiv/jPigias/leo_s_rc_simulator_apkpure.pdfIn PDF document text
    • http://yoga-italy.space/the_tourist_game_metacriticrmu8x.pdfIn PDF document text
    • http://doporujela.iblogger.org/reported_speech_reporting_verbs_exercises_online.pdfIn PDF document text
    • https://cdn.sqhk.co/sivadapexiri/eiDKQiM/offroad_4x4_car_driving_mod_apk_revdl.pdfIn PDF document text
    • http://vupaniseb.iblogger.org/bekogoso.pdfIn PDF document text
    • https://cdn.sqhk.co/ralapogifur/TjZUoia/vitexufoxuzezekudujiliba.pdfIn PDF document text
    • https://cdn.sqhk.co/godajaxox/Mji2Lqd/wrapping_paper_sheets_cheap.pdfIn PDF document text
    • https://cdn.sqhk.co/pasojixaju/4hd4hiS/92296475308.pdfIn PDF document text
    • http://lnstagramverifiedsbadgeform.com/padisejigetetudepijefuma3xkwn.pdfIn PDF document text
    • http://prodson.space/pharmacotherapy_a_pathophysiologic_approach_test_bank4kwys.pdfIn PDF document text
    • https://cdn.sqhk.co/zetikitor/bf1Xjb6/25888117268.pdfIn PDF document text
    • https://cdn.sqhk.co/lokutibu/6jgSMDI/koketazodasibeji.pdfIn PDF document text
    • https://cdn.sqhk.co/wogokodu/8neidPF/jet_sprint_boat_racing_schedule_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/tezofugowura/jtygjja/choppa_meaning_in_rap.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/7099481e-65f6-46e7-b3fb-01a475dcfd01/zutawegenapesapeni.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/11958186-007b-4c91-92c0-cfb5a29f6e6d/fedipejilebowawefe.pdfIn PDF document text
    • http://gefotuja.rf.gd/zokudufefaxemezirapiduk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6fc9eaf7-31d4-4892-b070-8051bbf50eb8/8667291563.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76a62d72-da78-450b-afdd-8caeb7e533b5/kamefadaz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d40b18ba-c8f9-4f6e-ab7d-749143e5189a/ap_human_geography_frq_2018_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eebb1750-6046-4ea8-9a27-74d739074f87/blackstone_commentaries_on_the_laws_of_england_volume_3.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_off00011f91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F91 2872 bytes
SHA-256: 878e8b9a625b73f6e072a43fa768a54931f1bde77be408cfaaa7ea8b3918dc43
font_01_sfnt_off000129c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129C9 5624 bytes
SHA-256: 88d5db77ade54dd5f33c894cdd7b1f7d9cff3d6bb87154ff9745564f14d3fa4a
font_02_sfnt_off00013ce1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13CE1 11400 bytes
SHA-256: b957627e19ad7ffb2aa5bfe30ac82319b80993d4a23541d02d88d3fd5ab13737