Malicious PDF — malware analysis report

Static analysis result for SHA-256 32c727c7b900fcec…

MALICIOUS

PDF

80.8 KB Created: 2021-03-24 21:45:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 29daaef14a8401248d05df41d4be0152 SHA-1: b16d168c3db827e1d08d3061058640974161ca16 SHA-256: 32c727c7b900fcecce537aed670c0143b5b10f2a8ac51ef200640ea8e7258a1a
96 Risk Score

Malware Insights

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

The file is a PDF document flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier. It contains an embedded URI pointing to a suspicious domain, zajinet.ru, which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, appears to be a lure related to health information, intended to trick the user into visiting the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://zajinet.ru/strik?utm_term=which+condoms+do+not+cause+yeast+infections
    • https://cdn.sqhk.co/dodazija/ihhfqgu/am_fm_radio_software_free_download.pdf
    • http://sagunutu.medianewsonline.com/maths_number_puzzles_with_answers.pdf
    • http://dafesoxexigu.medianewsonline.com/nolorujeboniloxemirazitar.pdf
    • http://giwitap.getenjoyment.net/nepedurojatuxo.pdf
    • https://cdn.sqhk.co/mugolino/ic5zgiO/xabukawigufarebololufobe.pdf
    • http://lumogodasekepi.mypressonline.com/frame_relay.pdf
    • http://fonivoguko.medianewsonline.com/mappa_stradale_albania.pdf
    • http://legalvictory.group/95810877283cmz66.pdf
    • http://pro-komp-master.website/naxemamamefijune7n23e.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/10ab7228-eaea-4667-a59f-b2225687f68d/bulova_precisionist_watch_manual.pdf
    • https://uploads.strikinglycdn.com/files/254d9d96-7f53-4c2f-ad59-0f5a22be7fe4/la_biblia_latinoamericana_catolica_en_espanol.pdf
    • http://fonimegalidoxu.epizy.com/lorataluxomudoxeki.pdf
    • https://uploads.strikinglycdn.com/files/53d50e31-c900-45cb-9c83-678e291ef0ea/shark_ion_robot_750_replacement_battery.pdf
    • https://uploads.strikinglycdn.com/files/708cae0a-cc93-47f9-a9b4-570e4fe47349/digital_fundamentals_by_t.floyd_10th_or_11th_edition_by_pearson_publishers.pdf
    • https://uploads.strikinglycdn.com/files/3b7135e5-86ee-4681-bcf5-03926d536e56/6.0_powerstroke_engine_harness_diagram.pdf
    • http://povujijizota.epizy.com/atopic_diathesis.pdf
    • http://divupalol.epizy.com/guzovawema.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f40b.bin
1fcbbd9a3178ce1dbb282aac304c2d15db58efcc690d5a4f2da00b35fc165930
pdf-font-stream PDF embedded font (sfnt) at offset 0xF40B 5128 bytes
font_01_sfnt_off00010558.bin
c15426940fff0d3647906dfe56658d9492a60bb88fa8c05042fa92ffc38e491b
pdf-font-stream PDF embedded font (sfnt) at offset 0x10558 9960 bytes
font_02_sfnt_off0001275e.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34
pdf-font-stream PDF embedded font (sfnt) at offset 0x1275E 4324 bytes