Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3e820253e0caf10…

MALICIOUS

PDF

122.9 KB Created: 2021-03-08 19:59:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 519a05258a68c62bb5c1407cd5ff54f4 SHA-1: be248ae66b40b6338e6ca2e7e4c1c1b4458f51e9 SHA-256: e3e820253e0caf107bf311449e04bb043c44cb96b54268eb7aa450e69209b34d
194 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, many hosted on disposable domains or link farms, indicating a malicious intent to redirect users. The ML classifier and ClamAV detection strongly suggest this is a phishing or malicious PDF. While no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of techniques used to deliver malicious content or redirect to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 7

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://botokaw.ru/wix?keyword=ruby+tuesday+near+me+dallas+tx PDF link annotation
    • https://cdn.sqhk.co/minamojazi/iegd8gc/pevoziremu.pdfIn PDF document text
    • https://cdn.sqhk.co/sawibevas/ii4hjhe/basic_marketing_concepts.pdfIn PDF document text
    • http://milanbeachs.space/final_fantasy_7_original_sephirothb46m4.pdfIn PDF document text
    • https://narodejezagog.weebly.com/uploads/1/3/3/9/133988416/fusalu.pdfIn PDF document text
    • http://hookup157.online/android_google_maps_app_avoid_highwayss5yfa.pdfIn PDF document text
    • https://cdn.sqhk.co/riwifesineji/ghfhaUh/dstv_box_office_movies_this_week.pdfIn PDF document text
    • https://cdn.sqhk.co/jarixizotib/dSM1dZc/the_last_maverick_survival.pdfIn PDF document text
    • https://cdn.sqhk.co/jozazixefuf/djeSgi1/tuwuradefo.pdfIn PDF document text
    • https://fomodaduvi.weebly.com/uploads/1/3/4/7/134700625/nimutu-zorifibivit-jukevawewos-kutojije.pdfIn PDF document text
    • https://babulavired.weebly.com/uploads/1/3/0/7/130775389/perojudidutup.pdfIn PDF document text
    • https://cdn.sqhk.co/madufuxenuw/h2iaO05/my_boy_gba_emulator_for_pc_free_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365589/normal_601a9b116882c.pdfIn PDF document text
    • http://openplafond.xyz/kilopaxulerefeg1a38o.pdfIn PDF document text
    • https://cdn.sqhk.co/pazakazagoz/Ngc5gIA/discovery_hd_wallpaper_lock_screen_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/javeduner/ifgf0gh/down_the_mountain_meaning.pdfIn PDF document text
    • http://efarbok.xyz/lassurance_automobile_au_marocfjkep.pdfIn PDF document text
    • https://cdn.sqhk.co/jinubodilev/JAoihEG/how_to_write_a_business_plan_for_beginners.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497348/normal_601c6ed4704fc.pdfIn PDF document text
    • https://cdn.sqhk.co/tiruxugajo/UieQiad/65049051024.pdfIn PDF document text
    • https://cdn.sqhk.co/rekubapapup/giCbHif/dipevanefubut.pdfIn PDF document text
    • https://fatatarulawug.weebly.com/uploads/1/3/4/4/134474158/7870267.pdfIn PDF document text
    • https://cdn.sqhk.co/pamavunawi/gidbkjd/lightly_row_viola_sheet_music.pdfIn PDF document text
    • https://cdn.sqhk.co/virapazetif/igcbhcW/galaxy_class_starship_names.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off000199d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x199D8 3360 bytes
SHA-256: 2e99bedbe1850e0e847f8c4d1fadc52a6f137edfbb93fdce6b8456c9c66edc84
font_01_sfnt_off0001a5d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A5D6 5288 bytes
SHA-256: acb4f2d6746c22de1400ca92783499c38684b5031f67ef09fe536d55f023c3e7
font_02_sfnt_off0001b7c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B7C5 11424 bytes
SHA-256: a97d451462764aeba5e67c3286ddb470fb97e4ae51ef6383be49812bfc60986c