Malicious PDF — malware analysis report

Static analysis result for SHA-256 17a6f365de1ae4d6…

MALICIOUS

PDF

76.8 KB Created: 2021-03-15 21:18:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: a5417ce7d4a5454aadb3cea5e2954fd4 SHA-1: 5b2d74dc489ed9d1498ccb6c74db7c98f0a7ac4a SHA-256: 17a6f365de1ae4d6ed28ec88be7bcda4fddf3bb8988e02832605c2a62c5154d6
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 0.9997

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
  • 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://soxebez.ru/123?utm_term=expanded+and+standard+form+worksheets+grade+6 PDF link annotation
    • http://mikazuxo.mypressonline.com/gupiwalosawujololif.pdfIn PDF document text
    • https://cdn.sqhk.co/sewadokoka/5uhhBpO/61212838945.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385848/normal_6004c2a2b9344.pdfIn PDF document text
    • https://cdn.sqhk.co/sidogorego/iahanES/download_aplikasi_easy_screen_recorder_di_laptop.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485821/normal_5fdfd5473eaa3.pdfIn PDF document text
    • https://cdn.sqhk.co/busibelifiv/gihdYOx/da_approval_times.pdfIn PDF document text
    • https://cdn.sqhk.co/wemowubire/hbW2rgd/basketball_hoop_black_friday_deals.pdfIn PDF document text
    • https://cdn.sqhk.co/sebutarukaw/ceBYQ24/rukorufifobenosufofoguxo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454299/normal_5fc61028cc814.pdfIn PDF document text
    • http://xaredazisom.mywebcommunity.org/kejebesijo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488581/normal_6042216082e58.pdfIn PDF document text
    • https://cdn.sqhk.co/zabitokepum/giihjem/39843699601.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412900/normal_6015aad817c12.pdfIn PDF document text
    • http://baderezu.scienceontheweb.net/how_to_practice_english_speaking_at_home_youtube.pdfIn PDF document text
    • http://rosipale.scienceontheweb.net/cosmic_energy_healing.pdfIn PDF document text
    • https://cdn.sqhk.co/futevanu/jieicgj/download_game_six_gun_gang_showdown_mod_apk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fonawemosel.epizy.com/raxokep.pdfIn PDF document text
    • http://labireninofut.epizy.com/ejercicios_resueltos_de_crecimiento_bacteriano.pdfIn PDF document text
    • http://kivajujudupogij.epizy.com/kiwasemowebabakemikup.pdfIn PDF document text
    • http://namepafubi.atwebpages.com/what_is_going_on_outside_the_capitol_right_now.pdfIn PDF document text
    • http://lebozid.epizy.com/brinks_keypad_door_lock_manual.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_off0000ee3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE3F 5756 bytes
SHA-256: 947b2549fdb8487c64a3c95e209aa3c4f22398c5f42b00f76fb814ffe025061f
font_01_sfnt_off000101d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101D2 10504 bytes
SHA-256: 5f1c63ab19e87857db0ffda4625e0c290987e917ad0b0ce8f18bf25371041a44

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