Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf1c3d5e42b7ab60…

MALICIOUS

PDF

83.2 KB Created: 2021-05-07 05:23:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: c77951705cca9183e86a2c6ce73a6eec SHA-1: c97d8e7c0a5c989f6f57702df2c8d7f44fb6e59d SHA-256: cf1c3d5e42b7ab602b3e64ab7ce71d06ed2f595474c0ab092242af0222cff8ad
156 Risk Score
Tags
free-cdn-ebook-manual-lure

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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://gimoguvi.ru/strik?utm_term=2006+honda+civic+lx+repair+manual PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4475571/normal_5ffb582abe273.pdfIn PDF document text
    • https://cdn.sqhk.co/radofufalam/ie24ibB/gnomes_garden_similar_games.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368746/normal_5fcd52551622e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420915/normal_5ffa857fd2cdb.pdfIn PDF document text
    • https://dawifibikinofi.weebly.com/uploads/1/3/4/6/134682228/4322337.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374838/normal_5fcf0e75b4b04.pdfIn PDF document text
    • https://cdn.sqhk.co/muvetowiripa/ahThhzL/81157652819.pdfIn PDF document text
    • https://bivovupoxewoko.weebly.com/uploads/1/3/1/3/131380626/77eda8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450048/normal_602cdadc7b3ec.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/d04f2d14-5083-4f80-b941-6d550adc9732/how_to_fix_leaky_bathroom_faucet_handle.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/86617d06-8d12-4602-bba6-4a2ea92eb942/zebov.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6fbc5cdc-8a35-4af1-9ff7-9d1c9bf66b53/intermediate_microeconomics_a_modern_approach_6th_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/632e749c-c9b0-4f76-828c-40063b3f8b2b/dungeons_and_dragons_5th_edition_dungeon_masters_guide_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/01764c91-8717-491c-9569-0ebc64024bbc/baby_goats_jumping_on_each_other.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/737720b5-4d05-405f-8ac9-451803232fe8/chekhov_best_short_stories.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/60d20d9d-6c5d-44cc-9a85-dd72435c7a31/how_to_change_ownership_of_kindle_fire.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/687c1f68-0de9-4603-a9ed-c1b6a82e98a2/how_to_reset_a_white_rodgers_1f78_thermostat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f2e3162-20b6-46eb-a26a-a508ab1a7408/difexivo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/129edc7f-678f-4093-a606-2fb7d2c23d0b/67014586860.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed9a07ae-4821-42ec-85c4-4cf2c9bf2912/how_do_i_program_a_rca_universal_remote_to_my_element_tv.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_off000105db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105DB 5596 bytes
SHA-256: 84855de12d68669449911c769c35e6c437c1c34eab3d4672b0df8e5ab699397f
font_01_sfnt_off000118bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118BF 11368 bytes
SHA-256: 5bb71c3e86085308e498651989e84a3955beab05a3c6b8db966d8d8febe6c911

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