Malicious PDF — malware analysis report

Static analysis result for SHA-256 dbec1be09169afac…

MALICIOUS

PDF

77.2 KB Created: 2021-02-28 04:59:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 4f8433cb063cdf582b255c7d51ae2936 SHA-1: 1c5373258ba208c084194cbe9f1f32330eb1d068 SHA-256: dbec1be09169afac619307fca11357421665ed98a364d76d0c2263c5d10b7143
184 Risk Score

Malware Insights

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

This PDF file contains numerous embedded URLs, many of which point to disposable hosting and are part of a link farm designed to redirect users. One prominent URL, 'https://dafemum.ru/award?keyword=how+to+trade+forex+pdf+download', suggests a lure for financial trading information. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://dafemum.ru/award?keyword=how+to+trade+forex+pdf+download In PDF document text
    • http://fusubakitakudup.66ghz.com/mejedetozaxuronowipin.pdfIn PDF document text
    • https://cdn.sqhk.co/kapideto/ijehgvi/capsulectomy_cpt_code.pdfIn PDF document text
    • http://bikupiribofaz.iblogger.org/mahalaxmi_calendar_2017_marathi.pdfIn PDF document text
    • http://mumolazesinidix.getenjoyment.net/problems_as_opportunities_quotes.pdfIn PDF document text
    • https://cdn.sqhk.co/zedawuzijis/hgfkia8/jepifobi.pdfIn PDF document text
    • https://cdn.sqhk.co/penazavoxu/kifhhzv/59607958410.pdfIn PDF document text
    • https://cdn.sqhk.co/vibebexez/hcocVsV/darksword_armory_messer_review.pdfIn PDF document text
    • https://cdn.sqhk.co/biwizalibe/gAiX9hi/tiger_shroff_all_song_download_pagalworld_mp3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405440/normal_601e381dec0ae.pdfIn PDF document text
    • http://juwupexutaval.mywebcommunity.org/the_night_manager_netflix_uk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454562/normal_5ffff6334c39f.pdfIn PDF document text
    • https://cdn.sqhk.co/tupipitijil/e76a5jg/62243702354.pdfIn PDF document text
    • https://cdn.sqhk.co/fusojafiza/Khgicjd/grid_autosport_apk_1._6._1rc2-_android.pdfIn PDF document text
    • https://cdn.sqhk.co/dosakupu/hdhdy7X/92668345924.pdfIn PDF document text
    • http://jedusajinud.mygamesonline.org/99677989920.pdfIn PDF document text
    • http://tisiner.iblogger.org/audrey_font_family_free.pdfIn PDF document text
    • http://desoneveru.iblogger.org/funny_quotes_from_50_shades_of_grey.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pamakejexo.epizy.com/shooting_an_elephant_literary_analysis_irony_answers.pdfIn PDF document text
    • http://nabulegewuwal.myartsonline.com/cyberpunk_2077_johnny_silverhand_gun_console_command.pdfIn PDF document text
    • http://nurekalu.epizy.com/linakivexuvapu.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_off0000f15e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF15E 4980 bytes
SHA-256: 17feff1284bdbc8ba2f85e3e02749f9dbfa32feb4646ba95422e34ac64928abe
font_01_sfnt_off00010274.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10274 11008 bytes
SHA-256: 32830e1c11737b37d63374f14ce0f78adadae7cfe58c4f051f78d63d5c379569

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