Malicious PDF — malware analysis report

Static analysis result for SHA-256 977607ce1d1cfecb…

MALICIOUS

PDF

69.3 KB Created: 2020-11-10 02:25:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 3b27c579b356d930faa773c2cdfa6d4a SHA-1: 26e5f6a4234894ee07a99a8d862935530d341cfb SHA-256: 977607ce1d1cfecb6e52a41c1b4a87144914a0e97ae29ce8391cb9aa4cd00280
194 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a clipboard-command (paste-and-run) lure. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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://ggtraff.ru/123?keyword=league+of+legends+friend+appears+offline In PDF document text
    • https://cdn-cms.f-static.net/uploads/4375528/normal_5f8bf03c1c3c2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412396/normal_5fa0d409b41d2.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://uploads.strikinglycdn.com/files/62dab8b4-b34b-419e-9e3f-3a6dfa845650/21542109277.pdfIn PDF document text
    • https://s3.amazonaws.com/luxelula/71530172075.pdfIn PDF document text
    • https://s3.amazonaws.com/garorowa/un_lugar_en_silencio_2.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/nuderide.pdfIn PDF document text
    • https://s3.amazonaws.com/pegek/tosuxa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b97632e-55e4-4697-bad7-0c16ee1e41ca/nature_du_mot_dans.pdfIn PDF document text
    • https://s3.amazonaws.com/degerutisig/yu_gi_oh_duel_links_tea_burn_deck.pdfIn PDF document text
    • https://s3.amazonaws.com/zukukelejurotef/lords_mobile_apk_hack_download.pdfIn PDF document text
    • https://s3.amazonaws.com/zupenafud/20121040842.pdfIn PDF document text
    • https://s3.amazonaws.com/xukonakefules/ejercicios_de_decimal_a_binario_resueltos.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_off0000c5a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5A4 4952 bytes
SHA-256: 81319d257fd02a1ce9b29cca8b6f97e97897cd305b5364254ad5c4bf19fb9958
font_01_sfnt_off0000d688.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD688 10464 bytes
SHA-256: 62ab0135f9d305c3d042f962f48bf771cb81575d474d9155ab2e9c9eede85526
font_02_sfnt_off0000fa1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA1E 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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