Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa98312b8b307168…

MALICIOUS

PDF

81.0 KB Created: 2021-06-11 20:23:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: b47e86db32817bf080a03875ca9fdb3f SHA-1: c445f8672e9b376b7dba3bc5ec86151479433f4a SHA-256: fa98312b8b307168adca16d6f7774f024b6d8ac41c953c04f1fa85c8f5aa968f
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

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 and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://garglob.ru/pbw?utm_term=o+kanha+ab+to+murli+ki+mp3+ringtone+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4386366/normal_604cfc73603f2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404113/normal_5fff585b35cf8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475215/normal_603b4bdfb373f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387218/normal_5fcda146d5161.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477615/normal_5ffd7ff4d640e.pdfIn PDF document text
    • https://doxuginuf.weebly.com/uploads/1/3/5/3/135346615/lemej.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463306/normal_6008503050568.pdfIn PDF document text
    • https://wuriwodek.weebly.com/uploads/1/3/4/6/134688082/e2bce74.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501204/normal_600f4ea410135.pdfIn PDF document text
    • https://sepuzemafunud.weebly.com/uploads/1/3/4/5/134584668/witugituduwu.pdfIn PDF document text
    • https://daxogane.weebly.com/uploads/1/3/2/8/132815110/nowonabaxo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417119/normal_60bdc9172a48b.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://lulatigono.pbworks.com/f/junie_b_jones_book_1.pdfIn PDF document text
    • http://tezalef.pbworks.com/f/tech_nivas_virtual_space_android_9_apk_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1c86018-1cad-4361-a739-3292d3f00b54/schwinn_airdyne_ad6_assembly.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b48aa362-1171-4528-99df-85370eeaae9f/bowflex_pr3000_box_dimensions.pdfIn PDF document text
    • http://gazumadu.pbworks.com/w/file/fetch/144472269/what_is_the_metabolic_factor_program.pdfIn PDF document text
    • http://gonumutat.pbworks.com/f/cod_mobile_system_requirements_android.pdfIn PDF document text
    • http://sofutikajen.pbworks.com/f/how_to_register_tassimo_machine.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce2348d2-01f4-447d-b9b8-a471ab4761f0/considere_o_diagrama_de_fases_do_dioxido_de_carbono_co2.pdfIn PDF document text
    • http://tovemubu.pbworks.com/w/file/fetch/144885426/48458577899.pdfIn PDF document text
    • http://nosiravuga.pbworks.com/w/file/fetch/144481050/maths_activity_worksheets_for_grade_1_cbse.pdfIn PDF document text
    • http://xugatun.pbworks.com/f/construction_master_5_apk.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e3d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3D5 5564 bytes
SHA-256: dc458eb54fb70384444dc6c8b4c35f7dcc3d94c45b2543982c3cd2eb7c5f031a
font_01_sfnt_off0000f68c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF68C 2024 bytes
SHA-256: dc37461816ec92f0ed1316601fd5c6b06f5c1a5be203c138b3c3c6cdf5da3806
font_02_sfnt_off00010024.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10024 10940 bytes
SHA-256: 1da4e88c54d6fea9ed4fe9efff29f4268a02faf245d943322a96befa613780e9
font_03_sfnt_off0001258d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1258D 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34