Malicious PDF — malware analysis report

Static analysis result for SHA-256 a42ee5b7f4871e00…

MALICIOUS

PDF

81.8 KB Created: 2021-04-03 04:35:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: bba9b3089b741806933ccbb8a9021647 SHA-1: 98dcbe99c9bc99efb7a4b3e2f86915c0f34abb6d SHA-256: a42ee5b7f4871e004df7d651b6550a1126d446cd7862ea9b9b4fb719fa405f09
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 hosting, and is flagged as a link farm. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic indicates the document's intent is to trick users into downloading a password-protected archive, likely to bypass gateway scanning. The ML classifier and ClamAV detection strongly suggest malicious intent, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://lozipotod.ru/strik?utm_term=sustainable+development+goals+list+pdf PDF link annotation
    • http://kengoru.space/strategic_procurement_and_supply_chain_managementnlo9b.pdfIn PDF document text
    • http://pelinebaj.mypressonline.com/jularuwezexefodivatizeda.pdfIn PDF document text
    • http://cafe-cok.ru/tails_os_android_downloadm56ih.pdfIn PDF document text
    • http://larokamexi.sportsontheweb.net/can_i_clean_my_keurig_duo_with_vinegar.pdfIn PDF document text
    • https://cdn.sqhk.co/kosaboze/bYiiI7M/lego_star_wars_tfa_all_carbonite_bricks.pdfIn PDF document text
    • http://parkji5x.xyz/liruwub4ve.pdfIn PDF document text
    • http://medtechnika1.ru/zeoworks_slendytubbies_3_update71cnt.pdfIn PDF document text
    • https://cdn.sqhk.co/mixaluwekitu/3ihhiif/15273047243.pdfIn PDF document text
    • http://pemizirevubel.mywebcommunity.org/pazevowuvovazejakeluvi.pdfIn PDF document text
    • http://varistop.site/404385815220kr3l.pdfIn PDF document text
    • http://lamisorosasam.mywebcommunity.org/xexanijiroselo.pdfIn PDF document text
    • http://particuliers-societegenerale.xyz/how_to_crochet_a_blanket_with_chenille_chunky_yarnxyzyf.pdfIn PDF document text
    • http://wordsidepost.top/fedamunigipemafaxarewusn5tq5.pdfIn PDF document text
    • https://cdn.sqhk.co/dobopejig/Vrm3Tha/henry_danger_crime_warp_app_download.pdfIn PDF document text
    • http://naturapple.space/online_aadhar_by_aadhaar_numbernsptt.pdfIn PDF document text
    • http://morpeoplelife.ru/why_does_my_kindle_not_charge_fullyh1ukl.pdfIn PDF document text
    • http://differencecheats.net/nabeganimoxazeo2r5.pdfIn PDF document text
    • http://m-ryanaf.site/gozunugubotufobobijoxetaf1kmrd.pdfIn PDF document text
    • http://evakuator-uga.ru/36728815502lv35k.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/gurupixabogivaz/electrical_cad_blocks.pdfIn PDF document text
    • https://s3.amazonaws.com/sifawekujiki/what_kind_of_oil_does_a_2014_jeep_grand_cherokee_take.pdfIn PDF document text
    • http://zutugidod.onlinewebshop.net/juzusirabekow.pdfIn PDF document text
    • https://s3.amazonaws.com/vojapu/alchemy_and_herbalism_guide_wow_classic.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_off0001017e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1017E 5568 bytes
SHA-256: 6e0164b759e9199235780379bf569e616a355c6bdd2d1194be7e8aca96282541
font_01_sfnt_off00011465.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11465 10940 bytes
SHA-256: 34e2a80031ce3ef98db1ee0b36fb6aa2e986c297d551582616207e0294dff0b0

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