Malicious PDF — malware analysis report

Static analysis result for SHA-256 f92cfceee0d613a5…

MALICIOUS

PDF

71.1 KB Created: 2021-04-01 02:20:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 890efe929be5830df8bfa4f561c6a53a SHA-1: 11a25d25da9551f0a8ec530cb99b3ca01a2fdf68 SHA-256: f92cfceee0d613a582ddb20281efb468074a654d1030666a982defe671111d56
186 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 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 0.9995

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://pelibifir.ru/award?keyword=james+bastien+piano+pdf PDF link annotation
    • https://cdn.sqhk.co/wodelaganav/hyja2gj/coin_gun_farm_terraria.pdfIn PDF document text
    • http://itawegan.fun/98486556321n6fgg.pdfIn PDF document text
    • https://cdn.sqhk.co/kulobibab/pXZWhhI/strawberry_cheesecake_ice_cream_recipe_uk.pdfIn PDF document text
    • https://cdn.sqhk.co/limizolaxa/60ighjt/rational_exponents_and_radical_functions_worksheets.pdfIn PDF document text
    • https://cdn.sqhk.co/dagufiwus/gidjc62/don_t_wanna_die_today_dax.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480582/normal_600799a8b31d7.pdfIn PDF document text
    • http://tikovg.xyz/40736079080ta5kn.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497082/normal_605fa3c548e53.pdfIn PDF document text
    • https://cdn.sqhk.co/kopenanum/NdifGig/spider_solitaire_ios_5._1._1.pdfIn PDF document text
    • http://bitunowaluf.sportsontheweb.net/zanilibujudivibokilabos.pdfIn PDF document text
    • https://cdn.sqhk.co/vikoparif/i3ghwJC/bemarulupimilona.pdfIn PDF document text
    • https://cdn.sqhk.co/kegufamop/jekBZie/juzomakuvopikibi.pdfIn PDF document text
    • https://cdn.sqhk.co/raxuzuvuluf/oTRkihT/dragon_ball_z_dokkan_battle_tier_list.pdfIn PDF document text
    • https://cdn.sqhk.co/bupewazadufa/itcjgEe/trending_videos_today_2019_in_south_africa.pdfIn PDF document text
    • https://cdn.sqhk.co/wamedexipun/haEA5ji/lavujokikepega.pdfIn PDF document text
    • http://microbladingcertificationdfw.org/86344604590yriil.pdfIn PDF document text
    • http://genoray.pro/shark_navigator_lift_away_deluxe_replacement_filters7ue16.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://d8acad56-eb9a-42d1-a06c-a695c5b02328.filesusr.com/ugd/0ad6c7_c22d1610ed874a77b5ee455291ed38ac.pdf?index=trueIn PDF document text
    • https://01c19f78-c7d0-441a-b56a-8672493f87de.filesusr.com/ugd/9d66c7_2173c30000cc404d8edc166d3bf9d605.pdf?index=trueIn PDF document text
    • https://cd29ef07-728f-4a0b-b57b-23e770395c36.filesusr.com/ugd/f14cf6_bec7ddec8cba41b4a01f5ae6ea6e06bc.pdf?index=trueIn PDF document text
    • https://c779a0a5-5a96-4308-8c37-720837e0bdd2.filesusr.com/ugd/4f1d02_1851018d424847139de3fa23278fe95a.pdf?index=trueIn PDF document text
    • http://jisunopesaluzi.atwebpages.com/rifopedi.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_off0000d595.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD595 5188 bytes
SHA-256: 398d9399f97bdeaf7adb0ff364f9f2933d2fe93140c7ee3f2c146cab302d0b22
font_01_sfnt_off0000e72b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE72B 12148 bytes
SHA-256: eb783347fa211422ffdbc6efddb27e4d6e4cbc6ee2eefb4c5c2a7387bd5752f9

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