Malicious PDF — malware analysis report

Static analysis result for SHA-256 65d6097abb8b95d2…

MALICIOUS

PDF

104.3 KB Created: 2021-03-18 02:08:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 8017006caa58a2fb8a49ccf1f93c11d3 SHA-1: ecebb662392b6c40a17046529ef786be78e6a78c SHA-256: 65d6097abb8b95d24335f15a4dbae41d6e7efb87e30d7e37c42815ef933007db
166 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, and is flagged as a link farm. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic indicates the document's intent is to trick users into downloading an archive, likely containing a malicious payload, by providing decryption instructions. The ML classifier and ClamAV detection strongly support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://midufefew.ru/award?keyword=active+directory+pdf+file PDF link annotation
    • https://cdn.sqhk.co/xarupozikala/vgfxNwV/61611042760.pdfIn PDF document text
    • http://jevafurevozu.mygamesonline.org/fender_mustang_2_footswitch_schematic.pdfIn PDF document text
    • http://vamefegali.mywebcommunity.org/valpakine_200mg_ml_bula.pdfIn PDF document text
    • https://cdn.sqhk.co/jubawiwa/hBGrfig/35958110985.pdfIn PDF document text
    • https://cdn.sqhk.co/linidivez/9hdgyhd/amazon_alexa_deals_of_the_day_kindle.pdfIn PDF document text
    • http://milatepe.medianewsonline.com/how_do_you_say_godparents_in_greek.pdfIn PDF document text
    • https://cdn.sqhk.co/satukevaguka/rNhgbjj/pet_shop_of_horrors_mermaid.pdfIn PDF document text
    • http://fobilimutemas.22web.org/mamasavajupakebadixa.pdfIn PDF document text
    • https://cdn.sqhk.co/pazaxefuma/jckthgL/rid-_a-_bug_home_insect_killer_2.pdfIn PDF document text
    • https://cdn.sqhk.co/zimopaji/sjbgdhi/49816251456.pdfIn PDF document text
    • https://cdn.sqhk.co/wekababu/kijrMFG/tilenuruzip.pdfIn PDF document text
    • https://cdn.sqhk.co/fusureviweki/gjcpege/free_casino_slots_games_to_play_for_fun.pdfIn PDF document text
    • https://cdn.sqhk.co/jefulajidi/ZZjgjhb/best_online_city_builder_games.pdfIn PDF document text
    • http://wepirafigezatid.22web.org/amazon_kindle_4_software_update.pdfIn PDF document text
    • https://cdn.sqhk.co/gederanew/ih4VRHi/company_of_heroes_2_population_cap_cheat_engine.pdfIn PDF document text
    • https://cdn.sqhk.co/torujazelome/jfihl2o/boromiguj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jusaketij.rf.gd/christmas_pictionary_words.pdfIn PDF document text
    • http://witibepav.rf.gd/compliance_policy_statement_template.pdfIn PDF document text
    • https://s3.amazonaws.com/daniwodug/fusakugefenaf.pdfIn PDF document text
    • http://fubavinexazixo.onlinewebshop.net/kali_linux_wifi_tools_github.pdfIn PDF document text
    • https://s3.amazonaws.com/xamibebulosaxug/81617057108.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000150d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x150D5 3072 bytes
SHA-256: ef93421794eb24b4b893498cac376534089824c4b04271d72df67dd910e3b923
font_01_sfnt_off00015bd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15BD1 4912 bytes
SHA-256: 41f57fa93363eaa253f5954e033807f0c036f72797a54497f45455e9015d0c27
font_02_sfnt_off00016caf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16CAF 11180 bytes
SHA-256: 78dd73e61909811df78ac7482ec1338e6bf092a398274f90e0fda15a8cb83ab0

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