Malicious PDF — malware analysis report

Static analysis result for SHA-256 c736069f4783dc5b…

MALICIOUS

PDF

87.8 KB Created: 2021-03-02 00:04:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: abcd06f34cea83cac762ffa9918d6cfd SHA-1: db2797217d4b2e4c3eeb98fcb28c43d63b29fc96 SHA-256: c736069f4783dc5b6d0e9a3248989cbebe49454ceb140e6c8ff3a25a3a546f19
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 0.9997

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
  • 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://dugedepap.ru/wix?keyword=whispering+death+from+how+to+train+your+dragon PDF link annotation
    • http://aarbuz.space/the_original_master_cleanse_by_stanley_burroughsyhrlc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379240/normal_5fe0b95e4a96c.pdfIn PDF document text
    • https://cdn.sqhk.co/zijigemeworu/cCgerME/country_music_charts_october_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/bapisolel/gdCidgi/crunchyroll_free_account_login.pdfIn PDF document text
    • https://bejazono.weebly.com/uploads/1/3/5/3/135315558/5944144.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366369/normal_60110fc358513.pdfIn PDF document text
    • https://cdn.sqhk.co/lojadisexudo/sDBhho9/14677478561.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480585/normal_6009ae3b31f4a.pdfIn PDF document text
    • https://cdn.sqhk.co/wazafepel/hehdFtK/block_breaker_3_play_online.pdfIn PDF document text
    • http://hihikane.space/pitozogezukopisunitoduwag5fzom.pdfIn PDF document text
    • https://voxuvuru.weebly.com/uploads/1/3/5/3/135390020/117436db26d4cac.pdfIn PDF document text
    • https://tafanoxuxirugo.weebly.com/uploads/1/3/5/3/135327873/677d748d.pdfIn PDF document text
    • https://cdn.sqhk.co/kojetovukufo/egegfzg/67362538068.pdfIn PDF document text
    • https://wulilunize.weebly.com/uploads/1/3/1/0/131071037/robibesapuwiru.pdfIn PDF document text
    • http://bestgirl69.com/how_to_draw_stormy_weatherdk7sx.pdfIn PDF document text
    • https://cdn.sqhk.co/tazifawixax/OjdhGgj/hyperion_launcher_apkpure.pdfIn PDF document text
    • https://bawiduzepafa.weebly.com/uploads/1/3/4/5/134597734/6354820.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
    • 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_off00010e4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E4E 5512 bytes
SHA-256: d61ecc12d1af58ecabe45169fd770540256b74ca6919868ee4ce08260740554f
font_01_sfnt_off000120f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120F6 10080 bytes
SHA-256: 8afac51b5c7af32366699903442b1a38a9538e88291765f6eabd3d15e00649dd
font_02_sfnt_off00014382.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14382 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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