Malicious PDF — malware analysis report

Static analysis result for SHA-256 64d46b46b4469599…

MALICIOUS

PDF

77.3 KB Created: 2021-03-30 03:18:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6695bef9d00d39644c6a950d3904727f SHA-1: 20253f41ff68a9a121669630c78837370dd6a75f SHA-256: 64d46b46b44695990e3b4780de47cb9952756685cff488f38d7e61e3b89f3b0f
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, identified by ClamAV as a phishing trojan. The ML classifier also strongly indicated maliciousness. While no scripts were directly extracted, the presence of an external URI suggests an attempt to redirect the user to a malicious site, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://resalured.ru/strik?utm_term=zebra+zt420+specs
    • https://static.s123-cdn-static.com/uploads/4383679/normal_6001a9647ed14.pdf
    • https://cdn-cms.f-static.net/uploads/4485578/normal_605f61144c2c1.pdf
    • https://cdn-cms.f-static.net/uploads/4491969/normal_6058e1b12f96b.pdf
    • https://cdn-cms.f-static.net/uploads/4483855/normal_605eea1e60212.pdf
    • https://cdn-cms.f-static.net/uploads/4409798/normal_604da7debec1b.pdf
    • https://cdn-cms.f-static.net/uploads/4492275/normal_6048158219b80.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://f459ab6e-ac57-43ce-b83a-1524846427e4.filesusr.com/ugd/938c70_908c3366d5f447f0bddf724f24221961.pdf?index=true
    • https://e809654a-a95b-4dbc-a338-24085255a2f8.filesusr.com/ugd/1b6cec_65c65f5536e24d2a94c0dadbc8c82d8f.pdf?index=true
    • http://fikikozazilut.rf.gd/bookworm_adventure_crack.pdf
    • https://uploads.strikinglycdn.com/files/4efe3b12-eca7-4f72-afcf-35856ecb0981/acoustic_guitar_lessons_for_beginners_videos_free_download.pdf
    • https://uploads.strikinglycdn.com/files/45158cb1-327c-4212-80ac-2dee3aeb1341/stoicism_and_the_art_of_happiness_donald_robertson.pdf
    • https://uploads.strikinglycdn.com/files/4259351d-690e-4d0c-9f37-a8682aef03c6/pogebasibejokusiwovoduli.pdf
    • https://4b98dde3-f65d-4e11-807b-d4501949e87b.filesusr.com/ugd/4a7ebd_547c723f6253475c9a7fc5114a741e76.pdf?index=true
    • http://regadozemi.epizy.com/79093303123.pdf
    • https://5b5cf7c4-d983-4e27-bd54-44d52fc9074e.filesusr.com/ugd/2f9450_34f97ffc5b8643dd8835a16f6890fddf.pdf?index=true
    • https://cad90261-f038-4e8a-b384-2e0e37e6cb8c.filesusr.com/ugd/4c4e45_2668cbc3f49b4d0dae86258a5e44e58a.pdf?index=true
    • https://2ea9429b-0332-4ee6-bb75-ab9535b56c99.filesusr.com/ugd/e2f7e1_52dbda4c4bd04b5786778672fec4de8f.pdf?index=true
    • http://wafubarig.epizy.com/bandhan_movie_all_song_bhojpuri.pdf
    • http://tinipolevuzow.epizy.com/school_map_for_minecraft_pe.pdf
    • https://uploads.strikinglycdn.com/files/f56f30dc-d690-4c78-b6b5-36e12294f8b2/22290347413.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_off0000e48a.bin
88a32038b963f75171128793213d026714d616b39a1847b60804725260b321d2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE48A 5404 bytes
font_01_sfnt_off0000f701.bin
fc54543b09430311e60983384fed083f9ec115a75d6c531c56b457692c10d97a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF701 15592 bytes

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