Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff29f29ab2c98b8e…

MALICIOUS

PDF

77.5 KB Created: 2021-03-02 05:19:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 00b340b649794864706454e81c61e03d SHA-1: f7be5730620408b961736fe82c0754f602d9dc96 SHA-256: ff29f29ab2c98b8e00f277b8c9f826a86dccbbd32877b9293b8b8d3f99a6455a
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a URL that includes keywords related to downloading software, suggesting a lure to trick users into downloading malicious applications. The document body is heavily obfuscated and truncated, preventing a more detailed analysis of its specific content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://kuzutuzo.ru/wix?keyword=nba+2k16+apk+free+download+for+android+tablet PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4419650/normal_5fcf6bc085c98.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401540/normal_5fdc56a593605.pdfIn PDF document text
    • http://werirugileveto.22web.org/windows_phone_calendar_app_for_android.pdfIn PDF document text
    • http://baby-slings.ru/give_me_liberty_5th_edition_volume_1_chapter_2_summaryjath2.pdfIn PDF document text
    • http://tesekitogibop.22web.org/icloud_activation_bypass_tool.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424347/normal_5fd6152c97a78.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391896/normal_5fd3083537954.pdfIn PDF document text
    • http://lisuzigerob.mygamesonline.org/how_to_record_with_dish_hopper_remote.pdfIn PDF document text
    • http://leafester.online/huawei_p30_pro_software_updatecamyt.pdfIn PDF document text
    • http://card2card.live/whirlpool_thin_twin_washer_and_dryer_manual93hp9.pdfIn PDF document text
    • http://premial.su/casp_study_guidevv2jg.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501027/normal_6021801c7bdcd.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/fojaxexino/18405558792.pdfIn PDF document text
    • https://s3.amazonaws.com/zodererezuzuxi/2003_dodge_durango_headlights.pdfIn PDF document text
    • https://s3.amazonaws.com/nawuvud/widukexuwopipisutubak.pdfIn PDF document text
    • http://nogobixa.epizy.com/7055982705.pdfIn PDF document text
    • http://jowanesivokadeb.rf.gd/longman_handy_learners_dictionary_of_american_english.pdfIn PDF document text
    • https://s3.amazonaws.com/rufonali/velikovawoboneviteb.pdfIn PDF document text
    • http://mogifukoku.rf.gd/wexinoxabodug.pdfIn PDF document text
    • http://zevesijuduma.atwebpages.com/batman_fanfiction_damian_kills_joker.pdfIn PDF document text
    • http://jenuvuzawo.epizy.com/5259525210.pdfIn PDF document text
    • http://pevurevakube.rf.gd/79965375400.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_off0000f251.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF251 5460 bytes
SHA-256: 483f7d8bbfad98c7e65aaecfd33ab5068e84626fdb0bf422dc89122004906e9a
font_01_sfnt_off00010513.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10513 10208 bytes
SHA-256: 3711fab7c9f65a576e64076cfc3628184a92ede1230e888569623fbea25800a8

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