Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b66efa7b26a90bd…

MALICIOUS

PDF

80.0 KB Created: 2021-02-19 08:53:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: fb95450ef7c5dc5a7b33d62e7258e3e0 SHA-1: d63778934aacd346455b3d792a9425ac0beb9963 SHA-256: 5b66efa7b26a90bdbd1e2190a1c7b3f8ba5298f0b7a3440878a8b87cf98d9bc1
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, indicating a high probability of malicious intent. It contains an embedded URI pointing to a suspicious domain, likely used to redirect the user to a phishing or malware-hosting site. The document body, though partially corrupted, suggests a lure related to 'split second decision meaning', which is likely a pretext to encourage clicking the malicious link.

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://jottigo.ru/strik?utm_term=what+is+split+second+decision+meaning PDF link annotation
    • https://cdn.sqhk.co/jadepibake/jgha1je/lyft_driver_app_support.pdfIn PDF document text
    • http://fipexen.iblogger.org/55880929298.pdfIn PDF document text
    • http://kirivil.iblogger.org/84219512981.pdfIn PDF document text
    • http://nobirejajatit.iblogger.org/kuruwomu.pdfIn PDF document text
    • http://selozufuwadapuw.66ghz.com/bike_racing_2018_mod_apk_android_1.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/bubisifapagefe/3d_bowling_games_free.pdfIn PDF document text
    • https://s3.amazonaws.com/lurutopobi/constraint_layout_guideline.pdfIn PDF document text
    • http://tezitap.rf.gd/allied_telesis_at-_fs708_poe_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/roxawo/agathiyar_tamil_movie_isaimini.pdfIn PDF document text
    • https://s3.amazonaws.com/xijilesuzuxo/castle_of_glass_karaoke.pdfIn PDF document text
    • http://mitoxewer.epizy.com/47251278399.pdfIn PDF document text
    • https://s3.amazonaws.com/zuvovoxigumuz/rufuzabefanudijigofex.pdfIn PDF document text
    • http://muwojes.epizy.com/champagne_bottle_label_free.pdfIn PDF document text
    • https://s3.amazonaws.com/litunux/zokuxuxa.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_off0000d01f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD01F 5192 bytes
SHA-256: a44126f86aee3e3af473419ab1a2430dc689bb4feb4460e47db85d976543accc
font_01_sfnt_off0000e1a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1A3 14744 bytes
SHA-256: 1b6d8be85582bce8dbff71c586578f963c5b23ab52acf6f785bb01c80ea8f350
font_02_sfnt_off00010fd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FD1 16060 bytes
SHA-256: bb4620ae2308066493f479cb0495314a41e91f5b0bfb2a754d9bad2ef34af03d
font_03_sfnt_off00012467.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12467 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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