Malicious PDF — malware analysis report

Static analysis result for SHA-256 dcaf0c1534658e20…

MALICIOUS

PDF

86.2 KB Created: 2021-03-01 04:12:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 42163908f757c0ebaeb908bf724567fc SHA-1: 177aec612bab82978b211d5f79b45219d725172d SHA-256: dcaf0c1534658e20802e7b37a21b19896d239041b90b9d4884ade2ac193ae345
136 Risk Score

Malware Insights

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

The PDF contains a heuristic indicating a payment redirection lure, suggesting a phishing attempt to trick users into changing payment details. The embedded URL points to a suspicious domain, likely part of the phishing infrastructure. While no scripts were explicitly extracted, the PDF format itself can embed malicious JavaScript, and the ML classifier strongly indicates maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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://pelibifir.ru/award?keyword=introduction+to+statistical+learning+theory+in+machine+learning PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4376359/normal_6028fc4f8433b.pdfIn PDF document text
    • https://lijafaxad.weebly.com/uploads/1/3/5/9/135989690/2205ef3c19.pdfIn PDF document text
    • http://kiwenalod.medianewsonline.com/xurovanezuzulegawuzug.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370777/normal_5fe261ac90b07.pdfIn PDF document text
    • https://kusebavizekofuk.weebly.com/uploads/1/3/4/0/134098677/wabelikodagano.pdfIn PDF document text
    • https://taxebalipawixu.weebly.com/uploads/1/3/4/5/134598188/dalajawetiziramikogu.pdfIn PDF document text
    • http://rozujed.sportsontheweb.net/12432617082.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373987/normal_5ffe921990e19.pdfIn PDF document text
    • http://borejukeluteva.mygamesonline.org/how_to_calibrate_my_homedics_scale.pdfIn PDF document text
    • http://bekopomulasebi.getenjoyment.net/2004_dodge_dakota_repair_manual_free_download.pdfIn PDF document text
    • http://myimperfectmomlife.com/69177572470hw9b6.pdfIn PDF document text
    • http://titanof-filtr.ru/dell_optiplex_780_audio_drivers_download_for_windows_10psr2t.pdfIn PDF document text
    • http://1offpark.xyz/43071667693xctpw.pdfIn PDF document text
    • https://zimuvudiredefux.weebly.com/uploads/1/3/2/7/132710782/sezimuno_mosukelo_zamif_zezop.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/papuja/29585709153.pdfIn PDF document text
    • http://zotubune.myartsonline.com/arduino_uno_r3_spec.pdfIn PDF document text
    • https://s3.amazonaws.com/nojemi/dugukiso.pdfIn PDF document text
    • https://s3.amazonaws.com/suxuzubojut/53627843032.pdfIn PDF document text
    • https://s3.amazonaws.com/xufaxoferugod/rebus_puzzle_brain_teasers_with_answers.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_off000107f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107F7 5272 bytes
SHA-256: 305cf55f09d87497225311acf8b03f2a9d9ed0b4e50de2189696af4e17545238
font_01_sfnt_off000119b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119B9 10184 bytes
SHA-256: 45045dbc6d57b9b7eca7b1a43ce5ca99cef1ed0ba168d60f7aab2ab90c094096
font_02_sfnt_off00013c89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C89 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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