Malicious PDF — malware analysis report

Static analysis result for SHA-256 20f3968b844f2684…

MALICIOUS

PDF

79.4 KB Created: 2021-05-11 01:27:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 351a9434a35cc3ae446338028f6abb3f SHA-1: 9020e0997b6276f6a28ce015b22cd03550dad395 SHA-256: 20f3968b844f26845d484a176046f46d0ac56cd64cdb57d4c669884a89a9cd91
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 0.9998

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 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://golowaki.ru/strik?utm_term=how+much+is+a+samsung+galaxy+s9+screen+replacement PDF link annotation
    • http://tapopapebesawu.getenjoyment.net/les_miserables_original_broadway_cast_album.pdfIn PDF document text
    • http://mokuduvejevuz.scienceontheweb.net/multiple_regression_analysis_example.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xuxirifuv.rf.gd/tozimizabezolatisofip.pdfIn PDF document text
    • http://nitobub.rf.gd/introductory_astronomy_and_astrophysics_4th_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe05825f-c1c4-492d-b6a5-3e4e63d0e9a2/7990155138.pdfIn PDF document text
    • https://1a2149e7-ca7f-4e7c-a584-0e483de6f3af.filesusr.com/ugd/9219f8_ec0d6875f9214019b83f2f4a8e3fa709.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/269c8da6-f3a4-4a17-af31-ba265ab5fb58/the_end_of_the_world_as_we_know_it__sara_farizan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/318c6805-508b-4aac-8c17-ad1774ac0391/47614445173.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae14a842-a184-48b0-b02d-995c9717fdf5/5177257581.pdfIn PDF document text
    • https://caa91486-5fcc-43b7-8b2b-5b817ae85bbe.filesusr.com/ugd/26bbcf_cfd91dcd9c7240a3a559bfa93a97247b.pdf?index=trueIn PDF document text
    • http://golofupatawef.epizy.com/50376944999.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ecbef16-0ce0-48a7-8475-6cf927a91410/31205459672.pdfIn PDF document text
    • https://828c6a01-da61-4814-986a-f72e64f4f334.filesusr.com/ugd/cdfdba_ea96c7375e8943cca3e2d41961e85d6f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/e63cdf97-0881-4358-8fa1-218e336a8b68/10119920546.pdfIn PDF document text
    • https://62dace35-232c-43a2-b3e8-6cf19ad57148.filesusr.com/ugd/42ae31_e097298dfb7744aabd7f8602a96e8cd3.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/bbc5c6e1-bb8b-49ea-9535-47e33ee63081/pumpkin_iced_coffee_dunkin_donuts_nutrition_facts.pdfIn PDF document text
    • https://5a8aee2d-3d68-4c09-98ed-743c9c56d6fd.filesusr.com/ugd/460efe_b4a2d5ab932c4dbca4b35908cfa28545.pdf?index=trueIn 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f5db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5DB 5724 bytes
SHA-256: d2864f649843236ca54741a5c51286e690cba53a31e414846f35d6b969292720
font_01_sfnt_off00010949.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10949 11360 bytes
SHA-256: 7b530cd8d14fbcf049679a87f97715f26cc145a565291cfb125c70dd2ea5abac

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