Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4027273a248eedf…

MALICIOUS

PDF

83.7 KB Created: 2021-03-20 19:03:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 36d01381789503fc4cb98b3945b50bad SHA-1: 8fe5ef852d8302aa7464dd45cf51b54cc246924c SHA-256: b4027273a248eedf0ecbfa6ea17ef1e92c0c75da06469945e6bdb84db6251052
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The embedded URL points to a domain that appears to be part of a phishing or malware distribution scheme, likely intended to trick users into believing they are accessing legitimate educational content. No scripts were extracted, but the presence of an external URI suggests the document's primary purpose is to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://druttle.ru/wix?keyword=icivics+worksheet+answer+key+international+organizations
    • http://originalhallyu.com/how_to_replace_a_toro_lawn_mower_wheeltu1wn.pdf
    • https://vakupakofusiwu.weebly.com/uploads/1/3/5/3/135399484/6968439.pdf
    • http://instacopyrighthelpteam.com/lowrance_elite_4_hdi_pricesn0n8.pdf
    • http://rat-red.space/what_is_error_code_32007_on_wiiuncl7.pdf
    • https://cdn.sqhk.co/rapovebakeb/dIxZVig/verizon_cloud_only_backs_up_contacts.pdf
    • https://cdn.sqhk.co/gaxobenona/kgjGmie/spirit_level_app_for_iphone_5.pdf
    • http://fruittea.space/round_table_talk_topicstl7w6.pdf
    • http://eurostore.info/gabelli_gold_fund_fact_sheetjjsnl.pdf
    • http://vozaxakinexu.iblogger.org/72828214682.pdf
    • https://vujilesozigo.weebly.com/uploads/1/3/4/0/134042384/9895f.pdf
    • http://groshyk.site/rival_electric_food_slicer_model_1030_76omuu.pdf
    • http://jolowenifar.iblogger.org/thanks_for_your_email_template.pdf
    • https://fujubonutebi.weebly.com/uploads/1/3/4/2/134266124/1134018.pdf
    • https://vedixoba.weebly.com/uploads/1/3/4/8/134864822/7678986.pdf
    • http://reactivaperu-viabcpi.com/aviva_platform_login_adviserct76r.pdf
    • https://cdn.sqhk.co/wibepudib/cPhiidj/scratch_2_free_for_ubuntu_18._04.pdf
    • https://cdn.sqhk.co/reposivekow/igeqifP/sasakejizurenutamamir.pdf
    • https://movireralu.weebly.com/uploads/1/3/4/8/134879142/80d68179a.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fesemuk.rf.gd/68091618964.pdf
    • http://zewipurorafe.epizy.com/curriculum_definition_collection.pdf
    • http://kazowive.epizy.com/78135005089.pdf
    • http://girifej.epizy.com/user_interface_design_guidelines.pdf
    • http://dileginaduke.epizy.com/embroidery_patterns_to.pdf
    • http://rujunigowe.epizy.com/79026063945.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f277.bin
8572c451b93f9e536ff22c9d84dd313f58edba3010e2bef60a12972994a2b0ff		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF277 5368 bytes
font_01_sfnt_off000104db.bin
1acb6aa423b82a6ff696b5c062fb04dd0dc1dadba66a5e5c1c19a07d77f36398		 pdf-font-stream PDF embedded font (sfnt) at offset 0x104DB 11492 bytes
font_02_sfnt_off00012bef.bin
3b1167557c0500c78008053c404847a906c4d495ef15adec583fc97e76626070		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12BEF 16068 bytes

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