Malicious PDF — malware analysis report

Static analysis result for SHA-256 2419a914039d3d31…

MALICIOUS

PDF

67.6 KB Created: 2021-03-12 08:45:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 6583a33f1f0aca5578659d4a005cccbb SHA-1: 5080243c001c0ef88ff743dbd377ef9e38627dcc SHA-256: 2419a914039d3d315539308a795246c0956523477aff601b96535c93c4350673
66 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 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 4

  • 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://zajinet.ru/wix?keyword=jimmy+the+baker PDF link annotation
    • https://cdn.sqhk.co/vozevadijut/Nig9ggv/idle_car_game_download.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473638/normal_5fe3b6caf2f93.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408323/normal_5fff5fabc109e.pdfIn PDF document text
    • https://cdn.sqhk.co/xulawajikigi/idwhLgi/ropaminigiguzamu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415769/normal_604ae76a97cc0.pdfIn PDF document text
    • https://cdn.sqhk.co/sifajoxojif/5fQsYtX/42194193863.pdfIn PDF document text
    • https://cdn.sqhk.co/lewoxiguj/hegihhA/38260012128.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454286/normal_5ff6b9aa23fe0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492900/normal_60321ea05b074.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464080/normal_6006e2b48294f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://9305c775-266c-4126-9ef9-90a5cffee957.filesusr.com/ugd/c3f88d_b91eaac02cf3454099b9ff0c67c01212.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e3adeff-6f74-431e-bba0-a94f3e106aa8/how_much_can_a_honda_eu2000i_power.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c0ddf18-c5c7-43d0-9444-721f9dd45444/20686141911.pdfIn PDF document text
    • https://2ffa788b-df2f-461f-b9c5-573bec542745.filesusr.com/ugd/374ce0_2dcb3bd6c121460e893be56f18730ac5.pdf?index=trueIn PDF document text
    • https://eecb1da5-82b7-48ef-90e5-6a20895c07e7.filesusr.com/ugd/88a84f_214691de09474837ad9595a338d87277.pdf?index=trueIn PDF document text
    • https://70fbc5f3-53e4-4072-9ff7-a5862d19847b.filesusr.com/ugd/bb3bf9_b4903b70c0a842c2b573bd7058b26d65.pdf?index=trueIn PDF document text
    • https://57933e30-1e86-4cbe-ad2b-777cb72f9932.filesusr.com/ugd/235f1a_902d479cb9c74fc1b74f6e3931f5a88b.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/50e233b4-ed46-4ca4-9851-1480cbfec6ba/gakazinufuk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/12c3b672-445b-43e7-990f-aaecf4d272c8/dosusixemolapuvi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51a837c1-8319-4095-bbf4-2d123b6bd657/is_it_possible_to_learn_python_in_a_week.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

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_off0000cd54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD54 5008 bytes
SHA-256: 765fc193da69d48acd3f0d4f6a009bfc876d78c25973a1d3ee788ceaefada283
font_01_sfnt_off0000de3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE3A 9988 bytes
SHA-256: 5d30b993724b56d33e9e8dea6beb15cd6287a76c8322659d283be1376d3c70fb

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