Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ce0427d255657ed…

MALICIOUS

PDF

80.8 KB Created: 2021-03-15 19:25:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 40cb99052c20927ae06577073f74f166 SHA-1: e795f3b7dbe9e8b265078a7d2108a1e82a45cfbc SHA-256: 3ce0427d255657ed4bfa839cc03fa615922dad9d52714b969942e4ef9b7333d1
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 0.9996

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://baarspo.ru/strik?utm_term=ariens+st724+manual PDF link annotation
    • http://helpcopyright-service.com/76332065816zkfmz.pdfIn PDF document text
    • https://cdn.sqhk.co/gixezovof/iiqghXx/simple_piano_app_for_pc.pdfIn PDF document text
    • http://lalashoppen.online/how_to_demonstrate_critical_thinking_in_nursingzxihb.pdfIn PDF document text
    • http://evatopshop.xyz/how_to_set_up_bearcat_880lhw6o.pdfIn PDF document text
    • https://cdn.sqhk.co/kewawukufiju/e1tVIgg/walkthrough_fall_guys_game_ps4.pdfIn PDF document text
    • http://fastpysystem.online/kick_the_buddy_hack_2020_iosf3n40.pdfIn PDF document text
    • https://lurufabufukigo.weebly.com/uploads/1/3/1/4/131407807/tuzotobi_lugevadunaki.pdfIn PDF document text
    • https://moxamegok.weebly.com/uploads/1/3/3/9/133999551/lixezoforunanuxet.pdfIn PDF document text
    • http://50offstore.info/piveji44xz7.pdfIn PDF document text
    • https://julamukipupa.weebly.com/uploads/1/3/0/7/130739907/wadejimamu.pdfIn PDF document text
    • https://veriketosamu.weebly.com/uploads/1/3/4/6/134675732/4878197.pdfIn PDF document text
    • http://fresh-ita.fun/employees_credit_union_near_meopjl4.pdfIn PDF document text
    • http://raisinshq.club/how_much_does_it_cost_to_fix_a_samsung_curved_tv_screen4i8z3.pdfIn PDF document text
    • http://itwomen.space/listening_skills_worksheets_for_grade_72fsuh.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/191ee8ff-b725-4d69-baf8-e747bfaffc15/rovajakilamenufezuzeli.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b1fa9cb-9a12-409a-9fca-8dc0b3154600/what_was_the_original_role_of_the_nco_dlc_1.pdfIn PDF document text
    • https://s3.amazonaws.com/mexijegedakol/brennan_savage_all_songs.pdfIn PDF document text
    • https://s3.amazonaws.com/wegemebufojafak/wibulevet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/34fdef93-df7f-4110-a69b-7cfcea267e1a/nigalawelosakuwu.pdfIn PDF document text
    • https://s3.amazonaws.com/xijuxosisomuna/aday_retmen_hazrlk_kitab.pdfIn PDF document text
    • https://s3.amazonaws.com/jotizifime/zokajodititipunu.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_off0000eb2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB2D 5120 bytes
SHA-256: c35fd2b74393817b18e14064fa1af8b28c814f693681fb627e5d1f222791d3cc
font_01_sfnt_off0000fc8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC8B 10444 bytes
SHA-256: f778f1d1a9a5391183e34556a1e3dd82a8416713ed799284fed4e41edf39038d
font_02_sfnt_off00012092.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12092 16204 bytes
SHA-256: c988415812f594187b0a0ed75dc52802e798e1695b49bd300f8412a65040a449

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