Malicious PDF — malware analysis report

Static analysis result for SHA-256 1dd98f072f4abf7c…

MALICIOUS

PDF

81.5 KB Created: 2021-03-29 23:30:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 918ee9ed47351cebfd0175bc35bae30c SHA-1: 516aa50d950a44f7551d38e9b4249cc9a7843891 SHA-256: 1dd98f072f4abf7c8132e252fa0a0f9c92859d07244c15dc28f37d7543f4ba74
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 0.9993

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 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://xezojetit.ru/award?keyword=bilateral+cleft+lip+repair+technique+pdf PDF link annotation
    • http://idealslim-ordina.site/87679462447gsjuf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484820/normal_5fc96c5099210.pdfIn PDF document text
    • http://swiss-gear.shop/how_to_do_adventures_destiny_2ojzi8.pdfIn PDF document text
    • http://repochka.site/delomenogamunopadufig8yshs.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486061/normal_603f0becc5dbd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464053/normal_5fd6458dbdc31.pdfIn PDF document text
    • http://moshon.space/xomebotufepuc8hbd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450907/normal_601dff220a3e0.pdfIn PDF document text
    • http://idealica-italy.site/65971155389e3fls.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/wazorixekunafob/65998488217.pdfIn PDF document text
    • https://s3.amazonaws.com/palevijuj/vaxepiwudozikere.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/99f2983d-0553-4f7c-8106-6b3abdbf33f8/panokagunumap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce327215-836a-41a4-8d71-0cbb8e3e4cb7/sosexikugizusebekizogu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa7136a6-1bab-41ce-a617-e59e9913d7fb/30421233005.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5f9fe3c-7e3f-4089-bfb9-3e4c74616750/juleko.pdfIn PDF document text
    • https://s3.amazonaws.com/kovozenamofox/96597239586.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2efaffc-2b70-4647-99e5-27255cf55e9e/visokurum.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed898f46-e286-4040-ba7d-481247665922/gimivoletil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/07c85ae8-963c-4d81-944a-bb34bc9b9f2e/lyman_all_american_4_turret_press_shell_holder.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8943909d-d242-4671-b103-b15eb59fce50/90423167897.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2f3f4dd-6dc8-4508-bf96-ce25ea6984ad/26108997146.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/101fcd1f-d963-4b35-9ef5-51d3ec5a872e/83579752590.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c65c5bc-c74b-4215-bd4c-a528477f287b/hi_point_c9_leather_holster.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/72133f3e-5730-40e9-8b6d-dcb4ffc4937a/66222653332.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_off00010083.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10083 5240 bytes
SHA-256: 8c95e1310c6261edf53bdd9abffe619e4d1aa73b191b2039a8948af4a0384bb2
font_01_sfnt_off00011250.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11250 11244 bytes
SHA-256: 1888305d416e57fe1e79b0838fbf79fac8f9b6c0064b1f7f2e7fb2340aa6852d

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