Malicious PDF — malware analysis report

Static analysis result for SHA-256 7966b0132c2856c2…

MALICIOUS

PDF

62.9 KB Created: 2020-12-15 17:42:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 138d7c9eb2747866da766f305645c509 SHA-1: 8f95a33fe10a115caaf898bc99f4033b49718e88 SHA-256: 7966b0132c2856c27af6e8a0d750a89ae40efddddad088f4b0219fb1dba8111d
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://gettraff.ru/wb?keyword=logo%20quiz%20level%2016%20answer'. This indicates the document's primary purpose is to lure the user to this external site. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the embedded URL is sufficient evidence of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://gettraff.ru/wb?keyword=logo%20quiz%20level%2016%20answer In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/susonanezaj/79687907065.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96480240-0fcb-4286-aeaa-ed8a53a6b894/electrolux_water_filter_ewf02.pdfIn PDF document text
    • https://s3.amazonaws.com/fajujiju/pefolerizedenodufesuzowaw.pdfIn PDF document text
    • https://s3.amazonaws.com/jajuzasalikirut/anencefalia_ecografia.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/novolamoxusutadiduxada.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc57785be9b69395129ae53/t/5fd046d3a91a8d243375be98/1607485142336/color_rope_2_game.pdfIn PDF document text
    • https://s3.amazonaws.com/damerirazib/foluba.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0805cd49dd12447321748/t/5fc57713e18c5c478eb51432/1606776596366/imaginarium_spiral_train_set_instructions.pdfIn PDF document text
    • https://s3.amazonaws.com/paxivogedewilu/8703516477.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc6b60c9ea50d41209c7834/t/5fc8c47a46ef2e08cbbe1b88/1606993019690/zevikizotoripokimijunile.pdfIn PDF document text
    • https://s3.amazonaws.com/wefadep/date_countdown_timer_android_app.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/01c1f086-ad5b-4c57-805c-c1f6955f10ac/giinii_dash_cam.pdfIn PDF document text
    • https://s3.amazonaws.com/mefovu/wusesanizajokaguxigubaxit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/68603a4d-7c06-4018-a7d3-e80e1bbf749a/ballet_during_the_romantic_era.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b890.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB890 5328 bytes
SHA-256: 879bf5309ee90027d676d0ed1b5f3d9756f80feb3096c1c6182ca66bd2cc22b2
font_01_sfnt_off0000cae7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAE7 10632 bytes
SHA-256: 90925fb983f23d55f3648a3cc152966d9015fbf195c1d2cad5b0095bbf409932

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