Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4bcc899a6cba60d…

MALICIOUS

PDF

82.1 KB Created: 2021-03-24 08:46:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: d60b50584b9a532afb500bbd54eff5b0 SHA-1: 21f5f39fcdbf68ca79c0595be9b5d7704c3c895c SHA-256: b4bcc899a6cba60d90618d161e69b2e4bd6745597fe5d33022015c620c57d5ae
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged by an ML classifier as malicious. It contains numerous embedded URIs, many pointing to disposable domains and link farms, suggesting a link farm or SEO manipulation tactic. The document body, though heavily obfuscated, appears to be a lure related to a '7th grade math quiz pdf'. No scripts were extracted, but the presence of many external links indicates a potential for redirection to malicious content or further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://fokemale.ru/award?keyword=7th+grade+math+quiz+pdf PDF link annotation
    • https://dasirexifavud.weebly.com/uploads/1/3/5/3/135320576/b4b90a7cd8d8dc.pdfIn PDF document text
    • https://xogowabixebeva.weebly.com/uploads/1/3/4/6/134612916/65015c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467601/normal_60283666dee5e.pdfIn PDF document text
    • https://cdn.sqhk.co/lofesaxudiwo/fMjfuja/zunofamosu.pdfIn PDF document text
    • https://cdn.sqhk.co/moxulofilose/9kehgR8/wezazaxokewivovifipuwefi.pdfIn PDF document text
    • http://vezapom.iblogger.org/malmo_ff_stadium_guide.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388158/normal_602be8f8e0740.pdfIn PDF document text
    • https://cdn.sqhk.co/sitopizol/Tjdheaq/58681582731.pdfIn PDF document text
    • https://jebapawobukil.weebly.com/uploads/1/3/4/5/134521284/1764354.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387586/normal_5feb3a1ae55d1.pdfIn PDF document text
    • https://cdn.sqhk.co/jobubexivex/kXiaZKr/narajejenos.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zaruxokogidut.epizy.com/dds_learners_test_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1494ae4-305f-4b98-a5b6-596aadb3e26d/5991396720.pdfIn PDF document text
    • http://gavuzolu.epizy.com/cpu_performance_comparison_list.pdfIn PDF document text
    • http://jifelig.epizy.com/carnatic_music_basics_theory_in_telugu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e27d48c4-e56f-48d6-b370-86c5c7e6908d/14110932144.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/93f48fa1-3eea-4d77-9e56-9aea5622c5ca/tugiligakuvifesiwilela.pdfIn PDF document text
    • https://s3.amazonaws.com/niporofez/robert_greene_48_laws_of_seduction.pdfIn PDF document text
    • https://s3.amazonaws.com/ponivotigegepub/44730845666.pdfIn PDF document text
    • https://s3.amazonaws.com/jijumupade/squirtle_shiny_form.pdfIn PDF document text
    • https://s3.amazonaws.com/fukepez/38649380708.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f983.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF983 2952 bytes
SHA-256: 013fc9f45313cdddd5762e6694753e55f6a85ad2eec225b6e17fd140af1ee5c7
font_01_sfnt_off00010412.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10412 5408 bytes
SHA-256: af40b21adeb4646b4d1ee680089c1cc06599215d799c1aa973ab9c3a8e624711
font_02_sfnt_off00011654.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11654 10668 bytes
SHA-256: f022257e48cb548216c74cbb5ab0d70450035e291dae1da0e8de0f3b127f5e60

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