Malicious PDF — malware analysis report

Static analysis result for SHA-256 52ac4f7d2c67a9f8…

MALICIOUS

PDF

78.1 KB Created: 2021-02-26 07:29:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: b6d1ee403f4cb800a637ad8be1e90059 SHA-1: 23fdde099c1bae046b0f902bcb85d2f11746e647 SHA-256: 52ac4f7d2c67a9f8cdc17ff6f00d3c645f3c4b506cde39f6848a68ba2132282d
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The embedded URL, https://maypoin.ru/strik?utm_term=polaris+office+5+pro+apk, suggests a phishing or malware distribution attempt, likely related to software downloads. The document body, though heavily obfuscated, contains references to 'Polaris office' and 'apk', reinforcing the lure of software acquisition.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://maypoin.ru/strik?utm_term=polaris+office+5+pro+apk PDF link annotation
    • https://cdn.sqhk.co/kerikone/vbgihhd/51984094287.pdfIn PDF document text
    • https://cdn.sqhk.co/dibirolinu/3hfijpJ/dafan.pdfIn PDF document text
    • http://lojapidabud.mypressonline.com/tu_puedes_sanar_tu_vida_de_louise_l._hay.pdfIn PDF document text
    • http://famozosivupiwij.sportsontheweb.net/51073836125.pdfIn PDF document text
    • https://cdn.sqhk.co/duzixulok/hdhhTAE/is_kiki_s_delivery_service_coming_to_netflix.pdfIn PDF document text
    • http://didazema.mypressonline.com/hp_officejet_4500_driver_windows_10.pdfIn PDF document text
    • https://cdn.sqhk.co/luwonowuwig/a9uwrQS/f1_manager_strategy_series_2.pdfIn PDF document text
    • https://cdn.sqhk.co/fesakesovoka/yjehjsq/make_your_own_music_beats_app.pdfIn PDF document text
    • https://cdn.sqhk.co/nibijegun/aBiidhe/34830182277.pdfIn PDF document text
    • https://cdn.sqhk.co/livukigelo/YijXjDJ/83160419474.pdfIn PDF document text
    • https://cdn.sqhk.co/xulawajikigi/aS7ijTU/blaze_obstacle_course_apk_obb.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/rerinago/liwubeta.pdfIn PDF document text
    • https://s3.amazonaws.com/gedexim/inspector_general_report_on_fisa.pdfIn PDF document text
    • https://s3.amazonaws.com/wuniku/3464937514.pdfIn PDF document text
    • https://s3.amazonaws.com/sonutopexaramuf/online_telugu_movies_app.pdfIn PDF document text
    • http://bodegifu.atwebpages.com/32954953193.pdfIn PDF document text
    • https://s3.amazonaws.com/jigezilor/kuvupivonebowogikefufad.pdfIn PDF document text
    • https://s3.amazonaws.com/wibedubosateg/what_does_chick_fil_a_starting_pay.pdfIn PDF document text
    • https://s3.amazonaws.com/nonabafat/suresan.pdfIn PDF document text
    • http://nejimafalun.onlinewebshop.net/traxxas_stampede_2wd_vxl.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_off0000f4b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4B0 5196 bytes
SHA-256: 645f3790974904952e11f47e5df7799cf1a2c279e443e1de750d0f8d96a50bf6
font_01_sfnt_off00010679.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10679 10772 bytes
SHA-256: 4422d32ee00510a0cb1f24c2a25a4d76dc8266f3824446b0b18956316091c05c

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