Malicious PDF — malware analysis report

Static analysis result for SHA-256 47fb1db0f6ea5ed3…

MALICIOUS

PDF

95.0 KB Created: 2021-03-12 08:05:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6340ca086e76bca48560e8cfd7a3af32 SHA-1: 20d7155cb9e7f28f8d0890b3606738f401cbe89d SHA-256: 47fb1db0f6ea5ed361424b1bbdb0a9d36225446a2d8bc174098124de2b24b5a4
96 Risk Score

Malware Insights

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

The PDF document was flagged by a machine learning classifier and ClamAV as malicious, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'golowaki.ru', which is likely used to redirect the user to a phishing or malware download site. The document body, though heavily obfuscated, suggests a lure related to bibliographic formatting, aiming to trick users into visiting the malicious URL.

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://golowaki.ru/123?utm_term=formata%25C3%25A7%25C3%25A3o+referencias+bibliograficas+abnt+2016
    • https://balevowoperat.weebly.com/uploads/1/3/1/3/131397989/a8aaf85c.pdf
    • http://kowojolajamuv.getenjoyment.net/mebosojofuwufofajivunup.pdf
    • http://sevowina.medianewsonline.com/marine_safety_equipment_suppliers_in_china.pdf
    • https://static.s123-cdn-static.com/uploads/4413975/normal_5ffce1c54f76e.pdf
    • https://cdn.sqhk.co/vetukalujir/gjvihhb/93756130233.pdf
    • http://siwosupegejolop.medianewsonline.com/descriptive_survey_research_design.pdf
    • https://cdn-cms.f-static.net/uploads/4445531/normal_603da660cb0be.pdf
    • http://najetaxu.mygamesonline.org/what_size_tires_fit_2005_dodge_grand_caravan.pdf
    • https://jowavuzawevubab.weebly.com/uploads/1/3/2/3/132303017/f691e2117ea7c.pdf
    • https://cdn.sqhk.co/xeduwukaxusa/gcjbFig/76951509356.pdf
    • https://cdn.sqhk.co/limizolaxa/jeITZ44/nail_art_accessories_shop_near_me.pdf
    • https://noromilo.weebly.com/uploads/1/3/4/5/134587763/9cd3fe4871fb.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://kubowulurarekij.myartsonline.com/list_all_the_windows_operating_systems.pdf
    • https://s3.amazonaws.com/xonobijikivo/xuvofivurutudujajunit.pdf
    • https://s3.amazonaws.com/fajixe/what_does_error_code_oe_mean_on_lg_washing_machine.pdf
    • https://s3.amazonaws.com/nelizenejakarug/biketaki.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011733.bin
42969e73f5b6f40473d6c5af6af053dede58acb681a808502a215f1229c2ffdf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11733 6064 bytes
font_01_sfnt_off00012add.bin
51ebeec29509b87aa858d500e37ac8853184703d07d1f913ce36d8e1dc7764c0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12ADD 1800 bytes
font_02_sfnt_off0001336b.bin
c4dd3b55c95571b968ebab784e5e8bb0cec47a4c8a851cd273bcca200389be46		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1336B 14424 bytes
font_03_sfnt_off00015dca.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15DCA 4324 bytes

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