Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ed685642d4a1e12…

MALICIOUS

PDF

80.0 KB Created: 2021-05-04 09:54:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 442572ce31c984deb5296c876205d5dd SHA-1: e800981aae2e5b2b1cc9900949d41d8f8044492d SHA-256: 3ed685642d4a1e12ccb1374d61d8e7b16df8c7b81244061dc3c19efe98151fc7
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 0.9993

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://golowaki.ru/strik?utm_term=cargill-macmillan+family+foundation PDF link annotation
    • https://cdn.sqhk.co/zogobadakedu/it5Q5oL/chennai_city_gangsta_hd_video_download.pdfIn PDF document text
    • https://cdn.sqhk.co/jekunesoru/hdgchdi/hockey_jerseys_hoodie.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/5670ea73-7762-4167-9d55-707832025621/what_is_the_benefits_of_wind_energy.pdfIn PDF document text
    • https://3c4962d9-41f7-4f14-8396-dad57cc8de20.filesusr.com/ugd/a2de88_1cd1f43ebf9340628616a5ecb354cc61.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fobupojowojon/jenn_air_smooth_top_electric_range.pdfIn PDF document text
    • https://s3.amazonaws.com/xefezesebusu/tenanagerede.pdfIn PDF document text
    • https://s3.amazonaws.com/dubiditiginowo/45359204425.pdfIn PDF document text
    • https://9e269ae7-c3cf-4b9f-bde2-1d9be064b7bf.filesusr.com/ugd/139869_b705164e439145b3bae0885267c2c4f1.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca76fed4-08b7-48d4-8b0a-ed8708173ca9/30336851267.pdfIn PDF document text
    • https://e5acd528-9925-4355-98ed-6c6122c9c19a.filesusr.com/ugd/49fecd_f82a4b525e2e4f9cb949ac0ec716d147.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa5680d0-a933-4ade-add5-c3ae8a562f58/vazifusovilada.pdfIn PDF document text
    • https://s3.amazonaws.com/rijaliwiguvex/anaconda_python_download_mac.pdfIn PDF document text
    • https://ffb80149-315c-4936-8637-e87477b606fc.filesusr.com/ugd/e7410d_0cdaf366f06345ec92949b24e5ef8fe4.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gopuze/nexag.pdfIn PDF document text
    • https://s3.amazonaws.com/fekaduvopigab/how_much_does_it_cost_to_fix_a_furnace_ignitor.pdfIn PDF document text
    • https://s3.amazonaws.com/gezetega/career_objective_for_performance_tester.pdfIn PDF document text
    • https://s3.amazonaws.com/bofake/84067846481.pdfIn PDF document text
    • https://s3.amazonaws.com/megelugik/filaxubexiwi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/581fe541-5d6a-47ef-a677-fdc045059732/que_es_el_estado_de_derecho_brainly.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b664e9e0-4be4-46a8-85e0-f17b600d60e8/let_the_right_one_in_watch_full_movie_online_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37283084-8200-4c8d-b23e-d5f54996db6b/84753516201.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5cff9ba7-e914-4b4f-8427-593f521d0210/aircraft_maintenance_technician_jobs_in_philippines.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb1e1ecd-95a2-4dea-bd98-7be6a61aef1e/angle_worksheets_grade_7.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/863232d4-821c-4696-b613-617899012590/pabivo.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_off0000f871.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF871 5200 bytes
SHA-256: 2c657b5574281dc71bdbdc1c46d515683ae34375453d799422914b4162574ff1
font_01_sfnt_off00010a1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A1D 11328 bytes
SHA-256: 93c797be6c78a4f75f0940707a2fa239e4db9d374c94d558feb5a47d9ddb6ab9

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