Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b908bfa72fadd5d…

MALICIOUS

PDF

73.2 KB Created: 2021-04-06 16:55:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e02f60852809b526de1d70672b4f0bb3 SHA-1: 68a1a7b4a90c73e17b3b561074b8c8512cbfb49c SHA-256: 2b908bfa72fadd5da034c39b8acb0219be8290cb72244150162557b7095eedb8
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, which is likely part of a phishing or malware distribution scheme. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://golowaki.ru/aws?utm_term=long+510+tractor+parts
    • http://afracheat3.xyz/55401632656c3gq8.pdf
    • http://itdiscounts.pro/how_to_make_training_manual_in_wordgjjl1.pdf
    • http://dozujub.22web.org/93063733075.pdf
    • https://cdn.sqhk.co/pasezateda/ideie1K/top_savings_goal_apps.pdf
    • https://nanivenom.weebly.com/uploads/1/3/0/9/130969334/1c66e5c792fc3.pdf
    • https://pubategikosiw.weebly.com/uploads/1/3/4/1/134131453/bejeg.pdf
    • http://raxuzogigegekaj.66ghz.com/remove_duplicate_data_in_excel_spreadsheet.pdf
    • http://copyrightsupporteds.com/geometry_worksheet_congruent_triangles_sss_and_sas_answersvnp2w.pdf
    • http://hookup753.fun/jirou_my_hero0zirt.pdf
    • https://xegubivagemegi.weebly.com/uploads/1/3/4/4/134481439/9732881.pdf
    • https://cdn.sqhk.co/pejemomet/oLYiijf/aapl_stock_split_announcement.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://bujekotu.atwebpages.com/87842168025.pdf
    • https://s3.amazonaws.com/tigovatolis/castle_otranto_summary.pdf
    • http://kivozusemu.atwebpages.com/wodidamuzed.pdf
    • http://tiluxusimutine.atwebpages.com/95322573805.pdf
    • https://s3.amazonaws.com/zamuriza/apna_csc_aadhar_card.pdf
    • http://zevesijuduma.atwebpages.com/tixaperate.pdf
    • http://disoluje.myartsonline.com/bayley_infant_neurodevelopmental_screener_bins.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e18b.bin
dc98f6679978fdcdab622c65e63087be7b5c8859afe3f4ac26d4f731385e6e57		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE18B 5328 bytes
font_01_sfnt_off0000f3c7.bin
641aa2137860da2d764c1ac4d00deff96573c382c5bbdbc3a45ee1b76042ac24		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF3C7 10528 bytes

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