Malicious PDF — malware analysis report

Static analysis result for SHA-256 23644df49d9ab2b1…

MALICIOUS

PDF

96.3 KB Created: 2021-02-11 15:21:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: b742a23d0781a698f1b522c8f68ff205 SHA-1: 63d3d8222acd013badd216261ac56776eea7db72 SHA-256: 23644df49d9ab2b1c5bbf9ed2f7d31ba15b7302cc1b66ef06947a33a71a0dcd9
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, which is disguised as a 'ffxiv 5.2 gathering leveling guide'. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded URL is likely used to deliver a secondary payload or redirect the user to a phishing site.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://yafferge.ru/wix?keyword=ffxiv+5.2+gathering+leveling+guide In PDF document text
    • http://linudanozuno.iblogger.org/forscan_spreadsheet_2017_f350.pdfIn PDF document text
    • https://vedixoba.weebly.com/uploads/1/3/4/8/134864822/xebozujagufagid.pdfIn PDF document text
    • http://jazesenebadajak.iblogger.org/lowonew.pdfIn PDF document text
    • https://simiwulizolur.weebly.com/uploads/1/3/1/4/131455232/zonokuvo_sokeliwod_jivajipasovum_jowavusa.pdfIn PDF document text
    • https://cdn.sqhk.co/mozoposowi/beVhbHE/85664005840.pdfIn PDF document text
    • https://cdn.sqhk.co/tokafumotebi/qINWbhc/74816278269.pdfIn PDF document text
    • http://sosutisokalelul.iblogger.org/xabixovedadaguwoli.pdfIn PDF document text
    • https://tuxinotem.weebly.com/uploads/1/3/4/8/134883911/dibiwakudox.pdfIn PDF document text
    • https://temavemata.weebly.com/uploads/1/3/4/6/134611183/konalukoda.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/kakekojezutok/50698225833.pdfIn PDF document text
    • http://bumilamufitilu.epizy.com/food_menu_template_photoshop_free.pdfIn PDF document text
    • https://s3.amazonaws.com/fizaxo/42550357283.pdfIn PDF document text
    • https://s3.amazonaws.com/jupevuxirapi/indian_ftr_1200_performance_parts.pdfIn PDF document text
    • http://zepibugab.rf.gd/angular_8_admin_template_open_source.pdfIn PDF document text
    • https://s3.amazonaws.com/bizamesuwepe/faviwagadizovijonaro.pdfIn PDF document text
    • http://repajazofuwide.epizy.com/corn_production_guide_in_the_philippines.pdfIn PDF document text
    • http://puxetixunelotaz.epizy.com/accident_report_sample_doc.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000118fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118FE 5136 bytes
SHA-256: c052497afaf69dcce96fa4570172584875e564396c813828346e871b461a1875
font_01_sfnt_off00012a78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A78 11032 bytes
SHA-256: 064077caedcddd3fdd16bedb0795587fee2535747fea7c9f343b12187b478f28
font_02_sfnt_off00015066.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15066 16092 bytes
SHA-256: 2c5f1a2e3d9f683f6a217a47aeaaae813f7d4ef732a5ff54a929695507d09140
font_03_sfnt_off0001652c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1652C 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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