Malicious PDF — malware analysis report

Static analysis result for SHA-256 be57367995196376…

MALICIOUS

PDF

78.1 KB Created: 2021-03-18 15:27:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 1d0c011eb335822c2d626874d435e511 SHA-1: b00af11ceab980b4bf059d022247afa6073b3363 SHA-256: be57367995196376b1c6e85a8a0c6ae87d2ec5dec4ad3662808ed9ca9f0c2edd
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to suspicious domains and redirectors, indicating a phishing or malware distribution attempt. The ClamAV detection and ML classifier further support its malicious nature. While no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to redirect users to malicious content, likely leveraging techniques associated with phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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 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.
  • 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/strik?utm_term=what+does+607+mean+in+numerology In PDF document text
    • https://cdn.sqhk.co/rojisixel/rgdgesJ/12076780221.pdfIn PDF document text
    • https://cdn.sqhk.co/kisoxukapab/hhng5lM/yandex_disk_free_space.pdfIn PDF document text
    • https://cdn.sqhk.co/zonurubo/gXA2zwv/togapovinojewitepubitega.pdfIn PDF document text
    • https://cdn.sqhk.co/zeputefilu/8KjjSm4/piano_hd_real_simulator_keyboard_pianista.pdfIn PDF document text
    • https://nupepapuk.weebly.com/uploads/1/3/1/4/131484133/zexozak.pdfIn PDF document text
    • https://nirasiban.weebly.com/uploads/1/3/4/3/134344158/kozana.pdfIn PDF document text
    • https://cdn.sqhk.co/zumumolebajo/FUigiil/96358134090.pdfIn PDF document text
    • https://cdn.sqhk.co/kipaselofuza/hi7m01u/dekorurezapalijukonexugi.pdfIn PDF document text
    • https://cdn.sqhk.co/wubunepan/ghJiege/samatawemiluzux.pdfIn PDF document text
    • https://cdn.sqhk.co/fazovivum/Wgchcgj/supernatural_investigations_romance_otome_game_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/tosijoxopum/higqMhg/account_balance_sentence_example.pdfIn PDF document text
    • https://zosifoke.weebly.com/uploads/1/3/0/8/130813504/cc668ac9f7861.pdfIn PDF document text
    • https://levapexufusetij.weebly.com/uploads/1/3/4/9/134904519/bubuv.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jivuxo/tegikawajaj.pdfIn PDF document text
    • https://s3.amazonaws.com/bisiku/environmental_management_plan_construction_template.pdfIn PDF document text
    • https://s3.amazonaws.com/zepifudoxapo/what_age_should_you_watch_twilight.pdfIn PDF document text
    • https://s3.amazonaws.com/bomifabipi/paxemekadolunibavojujimod.pdfIn PDF document text
    • https://s3.amazonaws.com/bupesejirijejus/tejumovebekiterarosetof.pdfIn PDF document text
    • https://s3.amazonaws.com/xokebore/chrome_browser_apk_for_android_4._2.pdfIn PDF document text
    • https://s3.amazonaws.com/ditiruz/hallelujah_piano_easy_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/zaxuledo/mixas.pdfIn PDF document text
    • https://s3.amazonaws.com/nowokil/megifupeditajomifarubuf.pdfIn PDF document text
    • https://s3.amazonaws.com/bitizopovopaso/33689557729.pdfIn PDF document text
    • https://s3.amazonaws.com/kawotexulozax/polaxosesexanepuzakoxuxi.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_off0000f29f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF29F 5732 bytes
SHA-256: 32377ed515f5b3fa050bb8e5197dd36adb5d5d5c7fe342bc3a5c8d8132e3b8b1
font_01_sfnt_off00010611.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10611 10696 bytes
SHA-256: 1fc82d25aa65064e01dc1e17e71266c66a6bfc6505eccb6f759a5b0be62e58b7

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