Malicious PDF — malware analysis report

Static analysis result for SHA-256 77c5340688eb72d6…

MALICIOUS

PDF

97.8 KB Created: 2021-03-18 03:40:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: c8d8cc962890f35d4e135082c9b970e9 SHA-1: cd004727f479e356a0b0436ee80f588f1d4fe363 SHA-256: 77c5340688eb72d64f77dcc9ee62119d3e5c324946c5f03df638885054ed5923
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that mimics a search result, likely intended to trick the user into visiting a malicious site. ClamAV and an ML classifier flagged this PDF as malicious, indicating a phishing or trojan payload delivery attempt. No scripts were extracted, but the presence of external URIs suggests a download or redirection mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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/award?keyword=autolisp+programs+for+autocad+pdf PDF link annotation
    • http://taher-tcac.com/how_to_convert_britax_frontier_clicktight_to_boosterny8j8.pdfIn PDF document text
    • https://basopuseg.weebly.com/uploads/1/3/4/7/134703880/6055224.pdfIn PDF document text
    • https://vujuzujotug.weebly.com/uploads/1/3/4/4/134478410/36105f94.pdfIn PDF document text
    • https://cdn.sqhk.co/bibolaned/het3agz/65524943384.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462697/normal_6000f51dd0e6a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401985/normal_604f09dcd69ca.pdfIn PDF document text
    • http://yyyyyyhhhhh.space/aged_care_guidefroj2.pdfIn PDF document text
    • https://vakitisize.weebly.com/uploads/1/3/4/0/134017930/ad8a71.pdfIn PDF document text
    • https://cdn.sqhk.co/duzemata/gdUhihi/revazaxenixomatesawod.pdfIn PDF document text
    • http://oyuncuxx.com/36016644372gi36v.pdfIn PDF document text
    • https://cdn.sqhk.co/nawamuzimosu/Rghijgg/guacamelee_super_trophy_guide.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392651/normal_60217f7b7ad1b.pdfIn PDF document text
    • http://gsmall.space/yamaha_01v96_v2_firmware_updaterhhzg.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/xonobijikivo/boxtops4education_online_submission_form.pdfIn PDF document text
    • https://s3.amazonaws.com/jinotugiwomo/south_african_joint_venture_agreement_template.pdfIn PDF document text
    • http://vukunazovi.rf.gd/cannibal_holocaust_link.pdfIn PDF document text
    • http://wajalapivibobi.epizy.com/asheron_s_call_spell_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/suximawo/85653421837.pdfIn PDF document text
    • https://s3.amazonaws.com/jifedefujodu/android_games_usb_controller_support.pdfIn PDF document text
    • https://s3.amazonaws.com/furunumaroxun/james_patterson_alex_cross_series.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_off00014242.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14242 5464 bytes
SHA-256: 6f3198c1fe046486c3f067f006fbdbbf8a6d1025f0ec16e7cb680b434683a184
font_01_sfnt_off000154c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x154C0 10980 bytes
SHA-256: 0a741818d2f1cc6f8d869fe376df3004f3d67a306bf11692ae3bd392b2f44188

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