Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e5f6de942e4d13f…

MALICIOUS

PDF

78.7 KB Created: 2021-03-31 04:30:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: f1b88cc0104a06fbf23b1aa499ed6c41 SHA-1: 96b8f650ba052806188fd3d0ff43f0e7ca0b442b SHA-256: 3e5f6de942e4d13f5fa83f7db721e65616a5434f257685e4664695f80e80d03b
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://resalured.ru/wix?keyword=words+that+start+with+he PDF link annotation
    • https://cdn.sqhk.co/danopefasuf/ugiE2jg/ben_10_up_to_speed_apk_game_download.pdfIn PDF document text
    • https://cdn.sqhk.co/gudijupimeb/geDicgj/gatulumasakotimo.pdfIn PDF document text
    • https://cdn.sqhk.co/wejafivelij/Gie0z07/ico_converter_program.pdfIn PDF document text
    • https://cdn.sqhk.co/zivuwimavez/Uhe8MWV/matexozamepabubilotemelel.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475563/normal_602b3d870ac16.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454821/normal_6046213498904.pdfIn PDF document text
    • https://cdn.sqhk.co/wazikunal/pDaCLih/joxupedozeforefobumofoliz.pdfIn PDF document text
    • http://vijexibat.mywebcommunity.org/adding_and_subtracting_integers_lesson_plan.pdfIn PDF document text
    • http://kitixukizogutik.mygamesonline.org/43915732467.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481161/normal_5fe7907f83876.pdfIn PDF document text
    • http://dugarudewemudo.sportsontheweb.net/nejukesi.pdfIn PDF document text
    • http://javosewo.sportsontheweb.net/artists_way_julia_cameron.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368998/normal_604940883c16f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://f6ce3cfb-f922-470c-9e0e-eaf724001b0e.filesusr.com/ugd/defcb2_5b3fa23ceb424c9a827e85b5451f1b91.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wifukedot/concrete_and_abstract_noun_worksheets.pdfIn PDF document text
    • https://dec4a425-646e-450a-80ca-a73a75d058ad.filesusr.com/ugd/ba3095_b1d2a96502074052ae78faff353a08d3.pdf?index=trueIn PDF document text
    • https://85fc0914-20e3-4f1c-be8c-de7e6f89f47e.filesusr.com/ugd/a44510_9630b4b497d644a0b5ce5ee8218ab8fa.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/suxugipipolazog/61401970083.pdfIn PDF document text
    • https://82f7a8bd-e2a3-46ec-bdf8-dd4727f017fb.filesusr.com/ugd/a90de3_d64fdf3375304f5083297731075b6e6e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wezukep/homemade_target_shooting_stand.pdfIn PDF document text
    • https://e25b5f36-ee09-4010-8803-019b2853a23b.filesusr.com/ugd/c34eac_6225dea4d0fd42f0966bc254462bb3ad.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tokatefozude/cinderella_song_by_kidi.pdfIn PDF document text
    • https://73a1781f-5c9f-4c76-8a11-a8e8c44f336a.filesusr.com/ugd/d9f7b5_70c9dcfaf4204a56a271ba738cd8ed26.pdf?index=trueIn PDF document text
    • https://945b3f91-9c76-4178-be32-f0dab3cfe2c6.filesusr.com/ugd/8d5d69_0773e31b0a58431d91668ef625a27248.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f660.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF660 4988 bytes
SHA-256: 4361e1d72c58509df769a3ffa774440d9c464deccf605e6c267de676e1b7565a
font_01_sfnt_off00010763.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10763 10656 bytes
SHA-256: 95007124b1b9fb7bd74960197985b39659d926c4d09c8ed6653bb5d905f1d3bf

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