Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b22b7c83b9d499f…

MALICIOUS

PDF

75.6 KB Created: 2021-03-12 05:57:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 2d7b57bd3f4162d926176a34d837377a SHA-1: a05c02dc9c65f4598895fc906bf43a0030fe8d95 SHA-256: 9b22b7c83b9d499fd6e593522bfdd0be6ce0f0890655a2c9324832e6541a8829
126 Risk Score

Malware Insights

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

The file is a PDF document that contains numerous embedded URLs, many of which point to disposable domains or link farms, indicating a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery. The document body, though heavily obfuscated, contains text related to PDF bookmark creation, which serves as a lure to the primary malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://lozipotod.ru/award?keyword=create+bookmark+in+pdf+online PDF link annotation
    • http://fruittea.space/move_relearner_location_pokemon_rebornkrk4k.pdfIn PDF document text
    • https://cdn.sqhk.co/nugizape/j8ggg3M/19352649945.pdfIn PDF document text
    • http://jekeluxuto.mywebcommunity.org/begin_the_beguine_noten.pdfIn PDF document text
    • http://shopwithsale.website/starbucks_hot_drinks_without_coffee_or_tea2l1lu.pdfIn PDF document text
    • http://fesupopimos.66ghz.com/26635434219.pdfIn PDF document text
    • http://jikusofare.mywebcommunity.org/28318060625.pdfIn PDF document text
    • http://theplafond.xyz/jovabubisudategelikarhxkiv.pdfIn PDF document text
    • https://cdn.sqhk.co/bobofibu/nVWhahg/bird_feeders_for_sale_near_me.pdfIn PDF document text
    • http://peguxukeziku.sportsontheweb.net/36102400581.pdfIn PDF document text
    • https://cdn.sqhk.co/bepeguvovori/AWvojgZ/lukalukagiruzokaderarejil.pdfIn PDF document text
    • https://cdn.sqhk.co/vuvapolaxaj/AroigWh/soccer_royale_clash_games_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/nobipajami/lzhKtif/war_of_the_roses_battles_in_lancashire.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wemopax.rf.gd/91386989609.pdfIn PDF document text
    • https://s3.amazonaws.com/bisiku/gipofovudejelo.pdfIn PDF document text
    • https://s3.amazonaws.com/votawawo/mortal_kombat_armageddon_ost.pdfIn PDF document text
    • http://pojozija.onlinewebshop.net/dyson_dc41_animal_troubleshooting.pdfIn PDF document text
    • http://jamosafiseb.rf.gd/niruvufaziviti.pdfIn PDF document text
    • http://gidimuni.epizy.com/nexajirigowekobaxi.pdfIn PDF document text
    • http://xobiluwova.epizy.com/dorakubigepeliwaderikame.pdfIn PDF document text
    • https://s3.amazonaws.com/vebogotexaf/bittencourt_penal_geral.pdfIn PDF document text
    • https://s3.amazonaws.com/kevava/61854493745.pdfIn PDF document text
    • http://nononulavojiki.myartsonline.com/61731086457.pdfIn PDF document text
    • http://sosesejuwukoga.epizy.com/how_to_manifest_a_specific_person_to_fall_in_love_with_you.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_off0000ec14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC14 5120 bytes
SHA-256: d6d86086490ae7a36135c9cb61e066462c413176f84b28121347d3f3cc6c0a90
font_01_sfnt_off0000fd65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD65 10440 bytes
SHA-256: adf8eaa76259b873018a4477c1b9902d21617e14451fad3ee401fc6c4d563c83

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