Malicious PDF — malware analysis report

Static analysis result for SHA-256 64cd5dd11af60238…

MALICIOUS

PDF

71.2 KB Created: 2021-03-13 21:41:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 3baef7dc60dcf236dddfcb4149f17133 SHA-1: d3830f1793fb047adcbe0803352478a23a212a6c SHA-256: 64cd5dd11af602389c606e2bb709b71d112b6de7f3556a16f683bd50f12ac627
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains heuristics indicating an external URI and embedded URLs, with one prominent URL pointing to 'baarspo.ru'. The ML classifier and ClamAV detection strongly suggest malicious intent, classifying it as a phishing trojan. The document body, though heavily obfuscated, contains text related to 'Tableau Reader', likely a lure to encourage interaction with the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://baarspo.ru/strik?utm_term=how+to+save+as+tableau+reader PDF link annotation
    • http://chategratis.online/81360523314assn5.pdfIn PDF document text
    • http://wirobigi.medianewsonline.com/visawexaruzatozoputuj.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449768/normal_5fe448c2031b9.pdfIn PDF document text
    • http://fosipuzo.mypressonline.com/74958190050.pdfIn PDF document text
    • http://casbah2point0.com/el_anarquismo_frente_al_derechoniruu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4504922/normal_5fc870a708be0.pdfIn PDF document text
    • http://rozujed.sportsontheweb.net/12432617082.pdfIn PDF document text
    • http://sukutoxuwurif.mywebcommunity.org/dizaxu.pdfIn PDF document text
    • http://jisutuxoxaza.medianewsonline.com/80676971498.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420013/normal_601aa97b986c0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/zarusegibitumet/nirazasabivufigusese.pdfIn PDF document text
    • https://f815f12b-539f-4060-8ed9-abd2caada31b.filesusr.com/ugd/ceb2e8_67bff14e750f4830b803ba828aa852a0.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tuletivotarupu/sheet_street_gateway_trading_hours.pdfIn PDF document text
    • https://8dfdba76-182f-4dc4-9dda-37a8c8d09dc9.filesusr.com/ugd/4ae4db_60b190947810486eb223cb2ca62e0569.pdf?index=trueIn PDF document text
    • http://bigapenegig.atwebpages.com/sejarah_berdirinya_amerika_serikat.pdfIn PDF document text
    • https://84bd2c60-91d0-47b6-9565-6ae8a6593e58.filesusr.com/ugd/963627_9ea715a2a7ee444f8c17d7ef1c5df280.pdf?index=trueIn PDF document text
    • http://wenares.myartsonline.com/winogirubufupazakabi.pdfIn PDF document text
    • https://s3.amazonaws.com/waduzirader/41347060393.pdfIn PDF document text
    • https://s3.amazonaws.com/pasawexawinogad/complete_jewish_study_bible_free.pdfIn PDF document text
    • https://s3.amazonaws.com/tixedujegibex/bajudezidulewuvigu.pdfIn PDF document text
    • http://kabuzore.atwebpages.com/pride_and_prejudice_the_movie_1995.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ce5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE5B 4800 bytes
SHA-256: fcc12aa9b01c198f365b705e9004e1f33fea8569ecb13c80fc169194a6ae1d16
font_01_sfnt_off0000dece.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDECE 10116 bytes
SHA-256: b7f6ba61c4518721f618d5b8726dc1ef31a97ba99546abe8a3b3e5ea18fa1dd7
font_02_sfnt_off0001015c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1015C 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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