Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a392ca6da489291…

MALICIOUS

PDF

85.6 KB Created: 2021-03-05 07:30:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 89028283ebc7c71780f5a2d8ef007524 SHA-1: 9fc0bb93040ba0aa76ffefd58965dcee6a1327bb SHA-256: 1a392ca6da48929135df11f247997e41aa8c5dd8bb76ff236552a85fd80867f9
126 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs pointing to disposable domains, suggesting a link farm or phishing operation. The presence of 'toefl vocabulary pdf magoosh' in the document body and URLs indicates a lure to attract users searching for educational materials, which is a common tactic for distributing malware or conducting phishing attacks.

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://lozipotod.ru/123?utm_term=toefl+vocabulary+pdf+magoosh PDF link annotation
    • http://werikipirojenob.scienceontheweb.net/33908246782.pdfIn PDF document text
    • http://wubosuvim.22web.org/lomatabifovunabamo.pdfIn PDF document text
    • http://tufuwavaziga.mygamesonline.org/42776945291.pdfIn PDF document text
    • http://nozipomak.iblogger.org/jopoberusanenereponefe.pdfIn PDF document text
    • http://xolokukifimiv.sportsontheweb.net/26865367266.pdfIn PDF document text
    • http://dumubemajizukov.medianewsonline.com/5th_edition_feats_list.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tivogowajap.epizy.com/86697527174.pdfIn PDF document text
    • http://gafodix.myartsonline.com/how_to_give_a_compelling_interview_presentation.pdfIn PDF document text
    • http://nabenejajoko.myartsonline.com/36980262200.pdfIn PDF document text
    • http://ginowane.onlinewebshop.net/the_lightning_thief_musical_music.pdfIn PDF document text
    • http://dejarovagozude.epizy.com/luciferase_reporter_vector.pdfIn PDF document text
    • http://towidono.rf.gd/avee_video_player_mod_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e51c0ec-436e-48c3-873f-ff54b6a658ab/what_is_the_storyline_of_the_nutcracker.pdfIn PDF document text
    • http://godutiliwaganos.rf.gd/zihale_masti_song_mp4.pdfIn PDF document text
    • http://zudosikewemer.epizy.com/89733673224.pdfIn PDF document text
    • http://rutenodisekorin.rf.gd/6th_pay_commission_report_in_karnataka.pdfIn PDF document text
    • http://pakoxerevigere.epizy.com/hillsborough_community_college_spring_semester_2019.pdfIn PDF document text
    • http://zadiriza.rf.gd/best_essay_writing_service_yahoo_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f245cd4e-5e89-4220-847d-61bf5c6ddee6/motorola_talkabout_t460_manual_espaol.pdfIn PDF document text
    • http://niforubuduxema.epizy.com/vibemuxokemupusamexuxi.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_off0000fde8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDE8 2872 bytes
SHA-256: 4be1e6352eec5e50790d040c5811efdbf591d3a7d52069ad5c5cef395ea6f639
font_01_sfnt_off00010824.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10824 5820 bytes
SHA-256: c4782c75a02d1980181f965b7e50b6be0563a1a3b8ed6f8f03cd08b2fe093fc9
font_02_sfnt_off00011bd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BD8 15992 bytes
SHA-256: b4fddd24b3a9cd0abfa82f371560d9f0ad1ff9e8fb50a91c73b1f72fac0d56eb

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