Malicious PDF — malware analysis report

Static analysis result for SHA-256 bfa60aa4bc02d289…

MALICIOUS

PDF

73.3 KB Created: 2021-02-19 05:59:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 07b82584e7e21957a0e0425435f2d9a1 SHA-1: eed16be9b8466f66c70751b8499283677459a770 SHA-256: bfa60aa4bc02d289d7d61aa14336d30add982e7fe149e8d152acb13a3e093abb
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a malicious site. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the presence of the external URI and the malware detection strongly suggest a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://leonvi.ru/wix?keyword=the+man+i+killed+chapter+summary PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4385436/normal_600ba4be84166.pdfIn PDF document text
    • http://idealslim-italiaoficial.site/lozutuxosonulenyb6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391899/normal_5fe9a7f8e59f4.pdfIn PDF document text
    • http://itfamily.pro/e_with_accent_french_keyboard0zevi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480743/normal_5fc7fd6cb4293.pdfIn PDF document text
    • http://tomogorman.com/fisco_agenda_2018_mexicoqn65e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478951/normal_601c911f3dbf1.pdfIn PDF document text
    • http://hugertely.xyz/woodturning_tools_for_sale_second_handf8jma.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485322/normal_5feda2664a45b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456119/normal_60198cabec4e4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fidefofudi/ecommerce_template_html_free.pdfIn PDF document text
    • https://s3.amazonaws.com/tometubufimopim/capital_expenditures_balance_sheet_income_statement.pdfIn PDF document text
    • https://s3.amazonaws.com/mosezavor/7785668129.pdfIn PDF document text
    • https://s3.amazonaws.com/xuzed/amma_tamil_movie_song_free.pdfIn PDF document text
    • https://s3.amazonaws.com/nijosinizo/7400494829.pdfIn PDF document text
    • https://s3.amazonaws.com/bajuse/puzijumotiwesu.pdfIn PDF document text
    • http://pusupap.rf.gd/backflip_ka_dar_video.pdfIn PDF document text
    • https://s3.amazonaws.com/xabalaru/hollister_uk_size_guide_mens.pdfIn PDF document text
    • http://fonajuwowo.epizy.com/guided_meditation_for_anger_management.pdfIn PDF document text
    • http://vetanafajodomek.epizy.com/video_maker_free_no_watermark.pdfIn PDF document text
    • https://s3.amazonaws.com/votuweroxigezog/2000_acura_tl_maintenance_light_reset.pdfIn PDF document text
    • http://fobupozomorefiw.epizy.com/pencil_caricature_software_free.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_off0000e3b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3B8 5428 bytes
SHA-256: ff3b574eada8e2312a0e174f5ec941a11fe989e5670990507f2e048506943f14
font_01_sfnt_off0000f604.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF604 9964 bytes
SHA-256: a15d6805615485d0a47d661c704bfce9757959e0f86e864ca20694db4293501a

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