Malicious PDF — malware analysis report

Static analysis result for SHA-256 78df86decf383d5d…

MALICIOUS

PDF

95.6 KB Created: 2021-03-03 07:16:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 3c35686c9f571160188406e930bb1471 SHA-1: e4ca80941258d824d139632c6f64089f21e65360 SHA-256: 78df86decf383d5d4b912708539274bc9a2ec850b1cd53c58a4c7de454432a5c
104 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file is a PDF that contains an embedded URL pointing to a resource that ClamAV identified as a phishing trojan. The ML classifier also flagged it as malicious with high confidence. The document body, though truncated, suggests a lure for a free PDF download, aligning with a phishing attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://xajibur.ru/123?utm_term=traction+how+any+startup+can+achieve+explosive+customer+growth+free+pdf PDF link annotation
    • http://lenuvivureropi.scienceontheweb.net/is_cyberpunk_2077_exclusive_to_xbox.pdfIn PDF document text
    • http://help-copyrightviolationhelpcenter.com/13179742178a9rsj.pdfIn PDF document text
    • https://cdn.sqhk.co/xuvisisitinu/JaMieVl/the_wolf_of_snow_hollow_release_date_uk.pdfIn PDF document text
    • http://kipokefurur.mygamesonline.org/56828064739.pdfIn PDF document text
    • http://jekeluxuto.mywebcommunity.org/me_myself_and_lies_bible_study.pdfIn PDF document text
    • http://richmaya.site/zadakojujalemexlbh.pdfIn PDF document text
    • http://hellochildren.online/mebokisuduriy08rg.pdfIn PDF document text
    • http://graatorama.space/rockstar_game_zone06cpy.pdfIn PDF document text
    • http://meziradidanaru.iblogger.org/belize_immigration_form.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
    • https://s3.amazonaws.com/farowug/38258709784.pdfIn PDF document text
    • http://wufutogaj.epizy.com/96278721646.pdfIn PDF document text
    • http://fugodijuw.rf.gd/stella_metal_platform_bed_frame_king.pdfIn PDF document text
    • http://lobivovakebala.epizy.com/angular_checkbox_group_reactive_form.pdfIn PDF document text
    • https://s3.amazonaws.com/nilafafakem/converse_plataforma_blancas_cuero.pdfIn PDF document text
    • https://s3.amazonaws.com/makumapikeze/agorastur_formacion_gijon.pdfIn PDF document text
    • http://fugufaza.myartsonline.com/is_real_estate_a_good_investment_in_2020_in_india.pdfIn PDF document text
    • http://bigapenegig.atwebpages.com/yamaha_ef3000iseb_battery_change.pdfIn PDF document text
    • https://s3.amazonaws.com/mefonevimimix/riddles_in_kannada_language_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/zijivevip/69605825235.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_off00012747.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12747 5724 bytes
SHA-256: 5e0136284e44affd400f1dce4ad5f85df601907234aee531975c627b16efc82a
font_01_sfnt_off00013aae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13AAE 10936 bytes
SHA-256: c0790a8086be7705c42efcea20f7b6c35556b857d755a4c4461cb5f1b5160cfe
font_02_sfnt_off00016001.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16001 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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