Malicious PDF — malware analysis report

Static analysis result for SHA-256 595ccf1c98ff0de6…

MALICIOUS

PDF

78.5 KB Created: 2021-03-27 15:44:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 53f247e5359f7e42d1f9cbe9e23ca934 SHA-1: 124e270c6e39ee59bf9f3cf14f0126d897651ab4 SHA-256: 595ccf1c98ff0de6fefe7d90cb336382a4750baa10da3e2d65d89dabb7025bf7
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-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.
  • 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://bologen.ru/wix?keyword=worksheet+atomic+structure+answer+key PDF link annotation
    • https://cdn.sqhk.co/rubovadu/hbLdoSD/jukelowixanise.pdfIn PDF document text
    • http://usesalle.xyz/wixebuzajitopisuzezaxudipq1t0y.pdfIn PDF document text
    • https://cdn.sqhk.co/rilabotib/0puHi1B/29686240072.pdfIn PDF document text
    • http://skidki-day.site/general_electric_annual_financial_reportynspw.pdfIn PDF document text
    • http://tokio-2020.fun/wosomop93f81.pdfIn PDF document text
    • http://naturaitalia.space/cybex_arc_trainer_750at_for_salepzxuz.pdfIn PDF document text
    • http://tokio-2020.fun/xarogoped1l00s.pdfIn PDF document text
    • https://cdn.sqhk.co/ninivaxibab/KpgjGij/kiropu.pdfIn PDF document text
    • https://cdn.sqhk.co/tuzevawu/rij0jfZ/61089986955.pdfIn PDF document text
    • http://eeuuurrrrr.space/angular_formgroup_array_examplenax4n.pdfIn PDF document text
    • http://br1.red/92460968251zxv2c.pdfIn PDF document text
    • https://cdn.sqhk.co/sokogiki/6jjjdje/software_test_completion_report_template.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/luropi/beaver_builder_pro.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e53d62d4-c609-4b56-8949-5a07fa59a825/25014470306.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b8e11b7-d67d-4691-b31d-d5e2a7b1741f/procare_cool_mist_humidifier_user_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b2de516f-42f6-4e99-98d4-048057c863ed/my_bluetooth_mouse_wont_connect_to_my_macbook_air.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b2e8ba1-57ad-4858-ac62-d07a7707849a/rurogebomadijazuzati.pdfIn PDF document text
    • https://s3.amazonaws.com/fifomi/75060650054.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02871744-c000-4d18-a411-7d707b772bc8/dapeparupamitivamipe.pdfIn PDF document text
    • https://s3.amazonaws.com/zusevamasor/vexoxasowizakininezutari.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ba38da7-03d9-40ac-8a01-bb824570b8d4/invitation_to_psychology_7th_edition_isbn.pdfIn PDF document text
    • https://s3.amazonaws.com/gowebabuxogiro/anime_wallpaper_android_phone.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_off0000f790.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF790 5276 bytes
SHA-256: bbdd2097c3e46e5768aeca508c533ab4f9437f3597c50b99811fb02fe57cdacd
font_01_sfnt_off00010973.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10973 10384 bytes
SHA-256: f06ee54a28b254d6e7c9064128a6a69c4faf05c2f3152c2df7e0e339d1ee4016

Open this report in the interactive analyzer, or submit your own file for analysis.