Malicious PDF — malware analysis report

Static analysis result for SHA-256 176235420655533f…

MALICIOUS

PDF

75.0 KB Created: 2021-03-09 22:33:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 78435fc790d51218be251d29b7e5f5e7 SHA-1: b56c23997530bf1f3f8f8e27460b3880f320e8bd SHA-256: 176235420655533f5f68d9a32041d1a22d5d86242f5a7465ca24347e288d82fb
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ClamAV and an ML classifier. It contains an embedded URL pointing to 'resalured.ru', which is likely used for phishing or to download further malicious content. The PDF structure itself shows signs of manipulation with duplicate object bodies.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://resalured.ru/wix?keyword=bao+tuoi+tre+cuoi+online
    • https://cdn-cms.f-static.net/uploads/4403273/normal_602c8e0a5f65a.pdf
    • https://tipozuroboga.weebly.com/uploads/1/3/4/2/134265922/bafibaf.pdf
    • https://cdn.sqhk.co/libavesonon/cOpjejf/upcycle_wedding_dress_diy.pdf
    • https://static.s123-cdn-static.com/uploads/4490534/normal_5fcecb43daf24.pdf
    • https://cdn.sqhk.co/ruwonumatag/ihze3hf/snake_in_the_grass.pdf
    • https://static.s123-cdn-static.com/uploads/4490122/normal_5fde3bb1307db.pdf
    • https://cdn.sqhk.co/siripeka/agfEigz/vejotufekagajovifar.pdf
    • https://cdn-cms.f-static.net/uploads/4482403/normal_5fe6ddecca55b.pdf
    • https://kasutuwisuruja.weebly.com/uploads/1/3/1/8/131872017/vujud_kokumufapedidir_tividipak_vaditeledugu.pdf
    • https://zirivuso.weebly.com/uploads/1/3/1/1/131164479/3955692.pdf
    • https://cdn-cms.f-static.net/uploads/4450883/normal_602c5eb73f895.pdf
    • https://static.s123-cdn-static.com/uploads/4402710/normal_600383b88b239.pdf
    • https://dukezowe.weebly.com/uploads/1/3/4/6/134602160/6468220.pdf
    • https://static.s123-cdn-static.com/uploads/4485329/normal_5ff136319f218.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://sikofus.epizy.com/74482041320.pdf
    • https://s3.amazonaws.com/retobifulipo/how_to_treat_metabolic_acidosis_in_dogs.pdf
    • https://s3.amazonaws.com/bexolamabad/duwusatatifabivusu.pdf
    • http://wanezezigemos.rf.gd/palaxovupekogawe.pdf
    • https://s3.amazonaws.com/tezofuretejom/student_attendance_management_system_project_report.pdf
    • https://s3.amazonaws.com/suxiweke/candy_crush_friends_hack_apk_2019.pdf
    • http://wekameti.rf.gd/windows_10_32_bit_usb_boot.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_off0000e6e8.bin
7499181370b9d1568a996c5a406e34188fb6c6f1a10428516c2c18c411fbffb7
pdf-font-stream PDF embedded font (sfnt) at offset 0xE6E8 4664 bytes
font_01_sfnt_off0000f6ce.bin
f53e3bc22b28804773c842bfe09f8f56e096ccb6eb72d2fd174c437c7c95cf48
pdf-font-stream PDF embedded font (sfnt) at offset 0xF6CE 11860 bytes