Malicious PDF — malware analysis report

Static analysis result for SHA-256 682b6187533c5694…

MALICIOUS

PDF

72.3 KB Created: 2021-02-17 12:24:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 5d919e514a1eca1ce6b450a1bdd2af33 SHA-1: f48ff8642c348a6c4e9b43a7489508be1f47ba8d SHA-256: 682b6187533c5694b87dca6430fe981afaa5210c0f0d71624bd2b4a315352fe2
104 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. The presence of an external URI pointing to 'jottigo.ru' and a heuristic for a visual download button suggests a phishing or social engineering attack. Although no scripts were explicitly extracted, the PDF format can embed JavaScript, which is often used to facilitate malicious downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/wix?keyword=oxidation+and+reduction+worksheet+ks3 PDF link annotation
    • http://maxawasoreveta.iblogger.org/17653973241.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370072/normal_5fee99d77ed15.pdfIn PDF document text
    • http://reduslim-officialsite.site/505811968855v2j.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367633/normal_5ffad9f5aa00f.pdfIn PDF document text
    • http://lnstagram-badge-verification.com/lock_screen_ios_14_style5vmuw.pdfIn PDF document text
    • http://heleogose.online/kitenokatulexidubokamapo5327.pdfIn PDF document text
    • http://deemonatrafik.xyz/beast_boy_shub_minecraft_housedcnb6.pdfIn PDF document text
    • http://4338bacchus.com/swag_and_sorcery_fashion_guidetz0zd.pdfIn PDF document text
    • http://kezujogorep.22web.org/rojeguburekezawewa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374522/normal_601d59786e85a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425737/normal_5fd0ded5b45f2.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/dudigonifu/multi_platform_games_ps3_vs_360.pdfIn PDF document text
    • https://s3.amazonaws.com/tudawufed/64271496961.pdfIn PDF document text
    • https://s3.amazonaws.com/xarojapi/career_in_physics.pdfIn PDF document text
    • http://rovafitazilom.epizy.com/kafarupa.pdfIn PDF document text
    • https://s3.amazonaws.com/dedinavesute/insomnia_rest_client.pdfIn PDF document text
    • https://s3.amazonaws.com/fajeloninesitel/gmail_emails_for_offline_view.pdfIn PDF document text
    • http://zixoridepub.rf.gd/cambridge_checkpoint_english_textbook_2_answers.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c9c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9C7 5412 bytes
SHA-256: 7969f9e415297b9d4069d32c7d7bd9369f7351986c9f5c629a2bc8f48e9ad510
font_01_sfnt_off0000dc40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC40 10016 bytes
SHA-256: 72767e91e01c33936d15b1dc2c32617137a670d6ad538f7008a88cf4e675537b
font_02_sfnt_off0000fec5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEC5 16088 bytes
SHA-256: a31bcf556e181db077c9b64db679e746f1af4c47e86886feaa6b1c1c5ec82d40

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