Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e1bb063cd9cefdd…

MALICIOUS

PDF

82.9 KB Created: 2021-02-18 13:04:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 66168ef1961e7e2fa181b89eef7b2ad8 SHA-1: 2cac378a8cc2da129f8d570bf7ee208dd4a4c543 SHA-256: 7e1bb063cd9cefdde5033e5527523454d571487c91e11703503bc57d2db26ebe
126 Risk Score

Malware Insights

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

The PDF document was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of embedded URLs, many pointing to disposable domains or link farms, suggesting a phishing or malware distribution campaign. The document body, though heavily obfuscated, contains references to external URIs and appears to be a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • 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://maypoin.ru/123?utm_term=what+are+the+different+types+of+kitchenaid+mixers PDF link annotation
    • https://cdn.sqhk.co/jigitovewuk/BSQjaic/ice_age_adventure_mod_apk_offline.pdfIn PDF document text
    • http://tonobipuko.iblogger.org/konedijepeserevumaviv.pdfIn PDF document text
    • https://cdn.sqhk.co/xegapanasa/jeVutGp/mupuronefagesazotulaneg.pdfIn PDF document text
    • http://lorebip.22web.org/mckinsey_report_2019.pdfIn PDF document text
    • https://cdn.sqhk.co/lepudijazur/hepjfif/fantasy_football_2020_covid.pdfIn PDF document text
    • http://doniposebuk.iblogger.org/19163745277.pdfIn PDF document text
    • https://cdn.sqhk.co/popaxutu/NbghspF/66127919372.pdfIn PDF document text
    • http://jukomanafow.22web.org/93830785590.pdfIn PDF document text
    • https://cdn.sqhk.co/pabopimi/jwSM5yN/car_simulator_japan_apk_indir_hile.pdfIn PDF document text
    • http://memijijarem.22web.org/91900874682.pdfIn PDF document text
    • http://xuriretijidaja.22web.org/fifegiboxaseje.pdfIn PDF document text
    • https://cdn.sqhk.co/muluxodipoto/gfSkjft/adidas_youth_swingman_jersey_size_chart.pdfIn PDF document text
    • http://wiinorama.space/kizedometewamalokesapap2scnn.pdfIn PDF document text
    • http://siondez.ru/46886318014on7zw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://wemazepiba.epizy.com/zezir.pdfIn PDF document text
    • http://latuwukatagowa.epizy.com/45966716202.pdfIn PDF document text
    • https://s3.amazonaws.com/tobobowu/aviansies_guide_rs3.pdfIn PDF document text
    • https://s3.amazonaws.com/timituvupame/vagidozoburunov.pdfIn PDF document text
    • https://s3.amazonaws.com/ditiruz/baaghi_1_full_movie_movierulz.pdfIn PDF document text
    • http://nazifaba.rf.gd/zobateguze.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_off0000f5b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5B8 5400 bytes
SHA-256: 4190a98418ad2ee3bf6381d4e6c1e9e8974d58a8005eea586886e6040098da90
font_01_sfnt_off000107fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107FB 11648 bytes
SHA-256: 13fddd55acf93556724617a53d56346ad7346660046aac00898d907faa83d557
font_02_sfnt_off00012f69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F69 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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