Malicious PDF — malware analysis report

Static analysis result for SHA-256 efe7293a16fad2f9…

MALICIOUS

PDF

71.2 KB Created: 2021-03-15 09:12:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b75e1ea980b41d67ff9967ab7fb83b64 SHA-1: bccb68b8993f57eedcfad2545811ace9e16256d2 SHA-256: efe7293a16fad2f97de672c874cbe1b4952b44969274ab9f35603e2de80f4a4d
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, specifically as Pdf.Phishing.Trojan. The embedded URL points to a suspicious domain, suggesting a phishing attempt disguised as educational material. No scripts were extracted, but the PDF structure and heuristics indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://dafemum.ru/wix?keyword=chapter+5+section+1+cultures+clash+on+the+prairie+worksheet+answers
    • https://mizevazorabij.weebly.com/uploads/1/3/5/3/135347525/xoguligazoxasezoro.pdf
    • https://cdn-cms.f-static.net/uploads/4460266/normal_601ff5214df44.pdf
    • http://matroskin.space/checks_and_balances_chart_answersndebi.pdf
    • https://wolaserirefuf.weebly.com/uploads/1/3/1/6/131637046/449998cd571b.pdf
    • https://cdn-cms.f-static.net/uploads/4388169/normal_603b2c93aeaf6.pdf
    • https://dopovubejaxow.weebly.com/uploads/1/3/4/0/134017692/xapobujafu_jodubigemo_dirufaw_fokedaj.pdf
    • http://8bitbeardsco.com/book_report_on_the_mis-education_of_the_negrodgjvc.pdf
    • https://rutesusu.weebly.com/uploads/1/3/0/7/130776221/mirozavutug.pdf
    • http://cocobuka3.xyz/810225018610jvc2.pdf
    • https://mizovitima.weebly.com/uploads/1/3/4/2/134266674/6061544.pdf
    • http://doucheop.xyz/lawirowulazuluvegefumomiptjzk.pdf
    • https://cdn-cms.f-static.net/uploads/4411926/normal_6028166ec0a29.pdf
    • https://cdn-cms.f-static.net/uploads/4407086/normal_601691fdaf16b.pdf
    • http://realnoe-obshenie.online/titikorebozewozilafiraxox6pkm1.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/tubukeganuji/siberian_crane_information_in_urdu.pdf
    • https://s3.amazonaws.com/wanasuvedigo/wabasedamukanufulupirad.pdf
    • https://uploads.strikinglycdn.com/files/60f61670-a828-4d0b-931f-8d209d386a91/vilegopizajuwuzotowom.pdf
    • https://uploads.strikinglycdn.com/files/cb96c72b-04bd-46ef-a63b-960c1071c170/how_to_use_sandisk_sansa_mp3_player.pdf
    • http://kodosalepixalan.epizy.com/71912344066.pdf
    • http://xubexiv.epizy.com/84555495406.pdf
    • https://uploads.strikinglycdn.com/files/c312d1ae-a9be-4509-8679-acfa90ba7a12/how_many_batteries_in_hunter_douglas_shades.pdf
    • http://laropijodozu.epizy.com/satuzovaparisuguro.pdf
    • https://s3.amazonaws.com/vuxalirudidel/jidaluxaliruta.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_off0000ccd1.bin
51f282a95006bab236b24083fef08bd84980786a02af9d23304b78c6442d9207		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCCD1 5260 bytes
font_01_sfnt_off0000deca.bin
08b6c372fe638b46c603d32bb2cf1e5ba76df28bdce77eaafa16a626f6229476		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDECA 10088 bytes
font_02_sfnt_off0001007f.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1007F 4324 bytes

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