Malicious PDF — malware analysis report

Static analysis result for SHA-256 d546bf226109ba66…

MALICIOUS

PDF

85.5 KB Created: 2021-03-06 19:38:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 3b78b98630c7bf7968ac73fa4db0be44 SHA-1: 38741bb761e11d162b623cd90e144ff4530c7ba8 SHA-256: d546bf226109ba661cd59fea1e3ca65dd0d43d3384873bde645cd8bb37cda46a
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://jumiwimov.ru/wix?keyword=river+god+wilbur+smith+free+pdf PDF link annotation
    • https://zokelafeg.weebly.com/uploads/1/3/4/8/134889419/c1221d917eebe41.pdfIn PDF document text
    • https://dojapoxozali.weebly.com/uploads/1/3/0/7/130775013/lizatotune_pepuzulakejure_kerulikawamux.pdfIn PDF document text
    • https://dimejozetef.weebly.com/uploads/1/3/1/0/131070151/4155979.pdfIn PDF document text
    • https://vukajikabazaxeg.weebly.com/uploads/1/3/4/7/134711597/fejemadibef-fokubinif-vavaragijeji.pdfIn PDF document text
    • https://relodavejufani.weebly.com/uploads/1/3/4/3/134373752/3858627.pdfIn PDF document text
    • http://usecabinets.xyz/baidu_browser_apk_freei118p.pdfIn PDF document text
    • http://ens-pictures.ru/94478650879yeoj4.pdfIn PDF document text
    • http://fakoxime.iblogger.org/ctet_question_paper_2_2017_with_answers.pdfIn PDF document text
    • http://vivuvulefova.iblogger.org/12073958849.pdfIn PDF document text
    • https://lebabipiw.weebly.com/uploads/1/3/0/9/130968925/nafipizim-golitudazurijux-fepewexekotev-ditudoxof.pdfIn PDF document text
    • https://malomunadososep.weebly.com/uploads/1/3/5/3/135351096/90dcbb40e4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wawutanow.epizy.com/liturilino.pdfIn PDF document text
    • http://palinimawibiw.rf.gd/viwuninobej.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eada7681-e865-4de2-9df2-73bf4a8b77bc/my_ge_hydrowave_washer_not_spinning.pdfIn PDF document text
    • https://s3.amazonaws.com/daxemo/54341481907.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/487ef4b4-5430-4c8b-b6d2-1b00811d858a/world_political_map_outline_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/xalexojaxipud/36695447028.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1fba1e1-0260-4ca2-bfa8-33cfcee2190b/pokoxatuferamividoli.pdfIn PDF document text
    • https://s3.amazonaws.com/bubodeliza/ramatigikozu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e91ec5d-d835-4616-a866-4aec1a18e674/when_worlds_collide_meme.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e1b4752-8561-47f4-b0e4-49b940ef7c71/78220150942.pdfIn PDF document text
    • https://s3.amazonaws.com/jejulurowev/destiny_2_attunement_of_grace_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/jazofi/31239359911.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_off000113db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113DB 5544 bytes
SHA-256: 984c1ffdfe318f2f3b1fbb32046d2308b20e7c42d0c824a312d226545091a706
font_01_sfnt_off000126a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126A7 9936 bytes
SHA-256: cfe948d16568e684a3464f6b2c7e7810b18bec4ea994c138d17c6f20e1d8a516

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