Malicious PDF — malware analysis report

Static analysis result for SHA-256 966bb11f4ba12af5…

MALICIOUS

PDF

75.8 KB Created: 2021-05-02 17:37:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: ba68c5b0a24950b26778d357dffa4c69 SHA-1: 5d423f97b826255598e6042504d1b2cb664c7ad9 SHA-256: 966bb11f4ba12af57287b3e3b9de0cb5b1d65a537279b118eab3661189d2110c
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains an embedded URI pointing to a suspicious domain, likely intended to deliver a secondary payload or redirect the user to a phishing site. The document body, though heavily obfuscated, appears to be a lure related to academic writing, suggesting a targeted phishing 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://gimoguvi.ru/strik?utm_term=how+to+write+a+reflection+paper+in+mla+format PDF link annotation
    • https://cdn.sqhk.co/wimedizi/AiiIYie/musicians_friend_cyber_monday.pdfIn PDF document text
    • https://cdn.sqhk.co/vijamabaf/lD9FdA0/cisco_ise_1._4_licensing_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/nukusigemug/jyznjig/knight_rider_2008_movie.pdfIn PDF document text
    • http://gunojiv.22web.org/75204289233.pdfIn PDF document text
    • https://cdn.sqhk.co/midijanere/gjNhhOz/40052337859.pdfIn PDF document text
    • https://cdn.sqhk.co/vikimono/jgsIjbQ/minecraft_unblocked_online_free.pdfIn PDF document text
    • https://cdn.sqhk.co/xovepejegosi/hgpX1ji/singing_christmas_tree_2020_bellevue.pdfIn PDF document text
    • https://cdn.sqhk.co/fedugaxoloz/h0k6DqJ/10473211443.pdfIn PDF document text
    • https://cdn.sqhk.co/jeforije/idjjr5W/95699742782.pdfIn PDF document text
    • https://cdn.sqhk.co/nobutowug/jgjfRCA/lost_horizon_2_apk_revdl.pdfIn PDF document text
    • https://cdn.sqhk.co/pategazikiw/GljjNie/xakifegaraxugum.pdfIn PDF document text
    • https://cdn.sqhk.co/xenudipu/ehc1Tgd/rediberasuwarupivanazegup.pdfIn PDF document text
    • https://cdn.sqhk.co/rekutadis/jgviihZ/78751923467.pdfIn PDF document text
    • https://cdn.sqhk.co/didowolikex/jj2Ujit/21820901877.pdfIn PDF document text
    • https://cdn.sqhk.co/mumeriretepi/gj3sIhg/71089655088.pdfIn PDF document text
    • https://cdn.sqhk.co/gixobujikelu/iggjnij/criminal_conspiracy_sentence_in_pa.pdfIn PDF document text
    • https://cdn.sqhk.co/filodomazora/djgyAjc/21368580200.pdfIn PDF document text
    • https://cdn.sqhk.co/dunuxorigu/ahhEyhi/50755223520.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/gomaxod/accomplishment_report_sample_document.pdfIn PDF document text
    • http://gafibis.epizy.com/bubble_struggle_pc.pdfIn PDF document text
    • https://s3.amazonaws.com/bomupi/katip_bartleby_trke.pdfIn PDF document text
    • https://s3.amazonaws.com/sefepugolupalax/rheem_electric_domestic_water_heater_owners_guide.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_off0000ec7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC7D 5036 bytes
SHA-256: c7555c1cb2489814c138492471fdd285407fea9adafc8be2fce5e84f103c0a8c
font_01_sfnt_off0000fda1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDA1 10824 bytes
SHA-256: a072ad6ab5b1921eaa1f835528e090db7f3f830d554a34efa6a7fbbfc65b8375

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