Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9f276fedcf59ee1…

MALICIOUS

PDF

72.9 KB Created: 2021-03-25 03:14:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: d214ca85ef12274deb1ace795414c9ae SHA-1: e168ff4bd65098559ce6340cc7ba367474a6f85c SHA-256: c9f276fedcf59ee191177aa9b13e3540707181a3c290a8f5f95f0a193b29bfc4
186 Risk Score

Malware Insights

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

This PDF document was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to disposable domains, suggesting a link farm or phishing operation. The document body is heavily obfuscated and appears to be malformed, further supporting a malicious purpose.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://jottigo.ru/strik?utm_term=average+a1c+for+type+1+diabetes PDF link annotation
    • https://cdn.sqhk.co/sadirurafixi/hhSjbig/428_super_cobra_jet_crate_engine.pdfIn PDF document text
    • https://cdn.sqhk.co/zuzipogowita/ViahalU/53562908625.pdfIn PDF document text
    • http://cetakchantek.com/fiziwogarasavux8x5.pdfIn PDF document text
    • http://creampiepow.club/pet_sematary_1989_-_gages_death_scene_4_10_movieclipsed03s.pdfIn PDF document text
    • http://pro-konditer.com/vurimugotenejefum4nmw.pdfIn PDF document text
    • https://cdn.sqhk.co/kelifevaz/oiigdjb/zarchiver_donate_apk_download_0._9_1.pdfIn PDF document text
    • https://cdn.sqhk.co/jarixizotib/h8zhf3l/silicone_rubber_sheet_uk.pdfIn PDF document text
    • https://cdn.sqhk.co/gimanoretev/hihEhjd/juzede.pdfIn PDF document text
    • https://cdn.sqhk.co/zaperarori/Siiibia/nhl_2021_schedule_release_date.pdfIn PDF document text
    • https://cdn.sqhk.co/satidaruxami/gin25hh/jafixinekeb.pdfIn PDF document text
    • http://ogranicbio.fun/5958714394wyusz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://fe92b815-f0fe-4223-924b-659339f44b90.filesusr.com/ugd/8f64fc_cf147d2691b4478596474e13fb46024d.pdf?index=trueIn PDF document text
    • http://vadeduvizutiv.rf.gd/can_covid_cause_high_blood_pressure_after_recovery.pdfIn PDF document text
    • http://fefisapuvekebi.epizy.com/intermolecular_forces_worksheet_grade_11.pdfIn PDF document text
    • http://kuxogazixup.rf.gd/housefull_4_movie_songs_320kbps.pdfIn PDF document text
    • https://d5f1d3db-1598-48d0-a061-764c190a6564.filesusr.com/ugd/866690_0ac5f0cde88c44b88f2bb94e6fb294e8.pdf?index=trueIn PDF document text
    • http://dukizovisepo.rf.gd/how_to_make_healthy_meal_planner.pdfIn PDF document text
    • http://kovemipenege.rf.gd/mafilojivonadomis.pdfIn PDF document text
    • http://wedutatitupaze.epizy.com/54831537461.pdfIn PDF document text
    • http://kezaforow.epizy.com/masofane.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_off0000d9cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9CB 5636 bytes
SHA-256: 3e1d587c385077fe092662730bb3051b4bb418dbb4194ea806e812ca7082a141
font_01_sfnt_off0000ed1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED1E 11608 bytes
SHA-256: 9067b0918575908bbbec17b535c2b618eb51c725d94e1e206ac00a417903f65b

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