Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbbaed8a9e4b9c8c…

MALICIOUS

PDF

72.9 KB Created: 2021-02-12 13:20:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 643ff18316a2306d250abbd841e6f211 SHA-1: 2588425dec1d1da14a07ff3904d1c86132acfc25 SHA-256: bbbaed8a9e4b9c8c8e6a8d04ad36698541f2e688766372c0322d0aaf5acc68bb
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL that directs users to a site offering software downloads, which is a common lure for phishing or malware distribution. The presence of this URL and the overall malicious classification strongly suggest a phishing attack pattern.

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://leonvi.ru/wb?keyword=baixar%20clustertruck%20apk PDF link annotation
    • https://cdn.sqhk.co/busosuwik/REqbmif/chase_mobile_log_on_problems.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476938/normal_5ff1b660b5db4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374696/normal_5fcb8dd661e0f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470821/normal_5fc7f6f8bd8ad.pdfIn PDF document text
    • https://cdn.sqhk.co/datolabevev/Jjdibms/36987530449.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446147/normal_6000a0c24eafb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387571/normal_6011d44e4fde4.pdfIn PDF document text
    • https://cdn.sqhk.co/mujejadalale/hcgigc5/gekakoxa.pdfIn PDF document text
    • http://sofebitaxed.iblogger.org/barron_s_6_gre_practice_tests_free.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460057/normal_5fcbd98b70348.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417527/normal_5fef13af7a2c8.pdfIn PDF document text
    • http://tojokepolosuku.iblogger.org/lulu_support_guide_s9.pdfIn PDF document text
    • http://autobaff.xyz/dafozozamupex9dgzo.pdfIn PDF document text
    • https://cdn.sqhk.co/puxedepobe/gfjhNjj/rodileribuvizakerapive.pdfIn PDF document text
    • https://cdn.sqhk.co/xomakonezema/jfejihh/3623605583.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371514/normal_600decca1ba2f.pdfIn PDF document text
    • http://help-feedback-amzn3.xyz/gmail_contacts_groupsymk2u.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c39f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC39F 5108 bytes
SHA-256: abc1af73483f079c5ae9f8e840231d5a49c3a4c5e7da27ea99c637d0609f8d33
font_01_sfnt_off0000d517.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD517 13872 bytes
SHA-256: 06e10261689c39241dcc3de07bc5cea1952ae73d422d27e233a43d7ba7e06860
font_02_sfnt_off00010038.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10038 16468 bytes
SHA-256: 8c92963620ab484564f6c10e6a7d632b7675ad42507ad80bd176a1469789a154

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