Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a46112379a7f103…

MALICIOUS

PDF

81.6 KB Created: 2021-03-30 09:04:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c604b4c289d314895bf87ae0296f979c SHA-1: dade4779f1e5fa2b85ff2a661aab24fa12964118 SHA-256: 8a46112379a7f103f9582466f975a1f027676943d9c0c288a894b6ff434d3897
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document body, though heavily obfuscated, contains text related to 'Taoyuan airport departure information', likely a lure to entice users to click on the embedded external URI. This URI points to a suspicious domain, suggesting a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://vilenefex.ru/123?utm_term=taoyuan+airport+departure+information
    • https://static.s123-cdn-static.com/uploads/4496148/normal_5ff78139d6858.pdf
    • https://cdn-cms.f-static.net/uploads/4481509/normal_6029d61d3885c.pdf
    • https://static.s123-cdn-static.com/uploads/4388162/normal_5ff16278d57b7.pdf
    • http://shopsupergood.site/char-broil_gas_grill_190_deluxe_assembly_instructionsdnhm8.pdf
    • http://fewizoge.22web.org/3178361397.pdf
    • http://startask.ru/17578442533w2s3v.pdf
    • https://cdn-cms.f-static.net/uploads/4495059/normal_5fe9c195a98e3.pdf
    • https://cdn-cms.f-static.net/uploads/4450139/normal_60321a65bf9d7.pdf
    • http://winwites.space/cartoon_tv_series_90s1r42a.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/d0671d37-b9a5-47ca-b355-ecbc8478576c/what_is_the_fees_for_spoken_english.pdf
    • https://uploads.strikinglycdn.com/files/f18482b1-5fc3-4700-803a-d3da20a4ac6e/10410401929.pdf
    • https://uploads.strikinglycdn.com/files/3fce5c53-e7c6-4ef0-8402-38b54b7b1e13/rawejogalivatodolimufame.pdf
    • https://uploads.strikinglycdn.com/files/c274361e-3b76-43c2-929b-ad91aa9b0504/59313138608.pdf
    • https://uploads.strikinglycdn.com/files/123c6d77-752a-4564-9a9b-32cfdd7c3b8e/i_heard_you_paint_houses_frank_the_irishman_sheeran.pdf
    • https://uploads.strikinglycdn.com/files/b94c907f-2359-4d86-9dcf-17e0b42d6fed/what_color_does_red_yellow_and_green_make.pdf
    • https://uploads.strikinglycdn.com/files/ea4688cb-42ec-48c2-bb78-6f8e1e2748b2/problemas_de_porcentaje_para_nios_de_6_grado.pdf
    • https://uploads.strikinglycdn.com/files/403f71e7-e912-474b-a8e6-81986c924d11/zeriguvi.pdf
    • https://uploads.strikinglycdn.com/files/d434728d-45c3-4f29-9295-0391232e90f7/roomba_e5_5150_review.pdf
    • http://fabosiregoz.rf.gd/vazopejowip.pdf
    • https://uploads.strikinglycdn.com/files/3e0a027f-0bb5-4209-93d0-48c0df893578/jupumukawogegab.pdf
    • http://xepalufozakot.epizy.com/difference_between_azeotropic_and_extractive_distillation.pdf
    • http://fojiguxojed.epizy.com/26486434917.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_off0000f3fe.bin
940541e3cc3028b3b05b6c303fb74fe4162295de3343eb9aad708706e940f772		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF3FE 4912 bytes
font_01_sfnt_off0001049e.bin
645b155a07e323333fb2de8ff5fbb07113672f0593a62a72f9b5ccac7b14830e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1049E 11056 bytes
font_02_sfnt_off00012a5d.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12A5D 4324 bytes

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