Malicious PDF — malware analysis report

Static analysis result for SHA-256 fae1f899b719e452…

MALICIOUS

PDF

139.2 KB Created: 2021-05-15 21:44:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: ecb1f965f267db61518aa86b5480bad3 SHA-1: bd89366993dc9a411f81b72786b16a80b3c4d04a SHA-256: fae1f899b719e4524ef4228009298bad34f7864672f05c92fda11e5c04f7c1ae
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://ponafet.ru/strik?utm_term=hallelujah+chorus+alto+part+youtube PDF link annotation
    • https://cdn.sqhk.co/valipovu/hd5PCid/12754193160.pdfIn PDF document text
    • http://storeeuro.info/nadosasasexajojumomi4nxo1.pdfIn PDF document text
    • http://theharaka.online/dutasavozemivipamjd4r.pdfIn PDF document text
    • http://carinsusa.info/spectrum_math_workbook_grade_8_free92cvz.pdfIn PDF document text
    • http://winoorama.site/21965594991waxpg.pdfIn PDF document text
    • http://wwwbcpzonasegura-viabcp.com/mountain_sniper_shooting_3d_fps6wg80.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375716/normal_6014913edbdff.pdfIn PDF document text
    • http://organize.shop/numerical_methods_faires_burden_4th_editionm7afm.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368989/normal_602291aa4bbf5.pdfIn PDF document text
    • http://mjawebdesign.net/can_you_get_a_payday_loan_with_a_prepaid_debit_carddxr9p.pdfIn PDF document text
    • http://helplnstagramcontact6088756.com/voxavirekus2f1x9.pdfIn PDF document text
    • https://cdn.sqhk.co/jamasedese/aLdibBo/extreme_landings_pro_apkpure.pdfIn PDF document text
    • https://cdn.sqhk.co/bigulikexupa/cXibgj5/emergency_calls_only.pdfIn PDF document text
    • http://easterthjg.com/short_summary_of_little_albert_experimenty5c3c.pdfIn PDF document text
    • http://grantmedica.ru/427385566458ug1q.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/libusamagowuvo/dunkin_donuts_iced_latte_calories_large.pdfIn PDF document text
    • https://s3.amazonaws.com/godoremitiwuja/37986775706.pdfIn PDF document text
    • http://saliguk.rf.gd/how_fast_can_the_body_heal_itself.pdfIn PDF document text
    • http://butevagowug.epizy.com/princess_coloring_sheets_online.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001d050.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D050 5300 bytes
SHA-256: 6867bc147d58ce8151f548aff56a2a0ec70139636378b98bb958dac719e8753a
font_01_sfnt_off0001e255.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E255 12344 bytes
SHA-256: 93a9eb6a0c192a0ea940f4cf486ac9b734eab49b395a3b8dda0f6e1537588eeb
font_02_sfnt_off000209c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x209C3 16060 bytes
SHA-256: 99ddc6f5858eb134f8024171ebe717cbd02485c31471b921a5021903b5272953

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