Malicious PDF — malware analysis report

Static analysis result for SHA-256 109f5265c61a69bb…

MALICIOUS

PDF

77.9 KB Created: 2021-03-27 14:38:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4cc5e0d01c92042b2d7a824286e17b73 SHA-1: 25bc6a1dc6b0f4a73a8faea75a2eaa40f0135363 SHA-256: 109f5265c61a69bbae624a75f8b01b54f3e93224d3ee1cae850a9f86bd49a156
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a malicious domain, which is a strong indicator of phishing or malware distribution. ClamAV detection and ML classification further support its malicious nature. The document body, though heavily obfuscated, likely serves as a lure to encourage interaction with the embedded malicious link.

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://midufefew.ru/wix?keyword=augustus+of+primaporta+date
    • http://rusolije.22web.org/what_is_the_difference_between_life_and_living_annuity.pdf
    • http://getchambre.xyz/8205252912038ksb.pdf
    • http://tafugegajotu.mygamesonline.org/45152762047.pdf
    • http://nout-sale.site/bil_bot_bluetooth_robotgr1rh.pdf
    • https://cdn-cms.f-static.net/uploads/4365636/normal_6010f7ad2daf8.pdf
    • https://cdn-cms.f-static.net/uploads/4471252/normal_605b1aec73cf8.pdf
    • https://static.s123-cdn-static.com/uploads/4454982/normal_5ffdaae141517.pdf
    • http://zikewexer.scienceontheweb.net/11856501038.pdf
    • http://dkblogin-de.best/how_to_start_windows_8.1_in_safe_mode_from_command_prompt91kmm.pdf
    • http://degujub.iblogger.org/converter_to_kindle_format_free.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://bepafazo.epizy.com/vemanutevofuwatuxigid.pdf
    • https://uploads.strikinglycdn.com/files/add06416-8839-43d8-a1d0-2d89e38f3936/how_to_connect_phone_to_hp_deskjet_2545.pdf
    • https://uploads.strikinglycdn.com/files/f9fc02d7-4168-477e-9c3d-a8bbc14b4b80/49266084472.pdf
    • http://fubavinexazixo.onlinewebshop.net/toxuveseporigiwokona.pdf
    • http://panexorumilogim.myartsonline.com/rewrite_conditional_sentences_exercises.pdf
    • https://uploads.strikinglycdn.com/files/3a9f0f7b-c9c7-4423-a400-285b047c1bda/92480646985.pdf
    • https://uploads.strikinglycdn.com/files/e9431361-dbe1-46b9-92d0-6f8b06d5e8df/4942015773.pdf
    • http://xemigososefof.atwebpages.com/kiboveduzozubusodawejo.pdf
    • https://uploads.strikinglycdn.com/files/0a448637-1c90-44c5-8956-ba43b4e39d86/percy_jackson_and_the_lightning_thief_book_chapter_6.pdf
    • https://uploads.strikinglycdn.com/files/7817f795-a5a0-4f1d-b8e5-9a7e0f2a5bcb/left_handed_remington_700_bdl_308_for_sale.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f259.bin
270bb22b00c4418e94d915e022ec8713db668b9b1cf693e3d5033633a977525e
pdf-font-stream PDF embedded font (sfnt) at offset 0xF259 5320 bytes
font_01_sfnt_off0001045d.bin
d9391d8dc593197f1624e01c01e9f7ec6e4aec9cf7f0efb4330ece7d2d448068
pdf-font-stream PDF embedded font (sfnt) at offset 0x1045D 10580 bytes