Malicious PDF — malware analysis report

Static analysis result for SHA-256 cdb61f2f371ea28f…

MALICIOUS

PDF

80.2 KB Created: 2021-03-12 14:35:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: 581a625e86fbe4e573ef70e50017ccb1 SHA-1: f68ceefe176a15461abe16fecc1fddaf73abfa1f SHA-256: cdb61f2f371ea28f681e40a1e429f700bcc0c6e5fa36cfcc18a8fe973f114c90
186 Risk Score

Malware Insights

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

The PDF document contains multiple embedded URLs and is flagged by ML classifiers and ClamAV as malicious. The heuristic 'SE_SECRET_RECOVERY_LURE' indicates the document's content is designed to trick users into revealing sensitive information. The presence of numerous external URIs, many hosted on disposable domains, further supports a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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://jumiwimov.ru/award?keyword=aes+algorithm+tutorial+pdf PDF link annotation
    • http://cetapp.xyz/what_do_you_need_to_replace_a_lost_drivers_license_in_mississippilwba6.pdfIn PDF document text
    • http://duwelizub.mywebcommunity.org/ruwekugo.pdfIn PDF document text
    • https://cdn.sqhk.co/temazajilib/qhayiay/46809580716.pdfIn PDF document text
    • https://cdn.sqhk.co/tezofugowura/qhbv05y/pasilozoda.pdfIn PDF document text
    • http://gejurabek.getenjoyment.net/84793200436.pdfIn PDF document text
    • http://wumewil.sportsontheweb.net/national_boat_liquidators_annapolis.pdfIn PDF document text
    • http://lojapidabud.mypressonline.com/smart_calling_art_sobczak_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/wesegagage/giaiiPm/kung_fu_panda_and_zootopia_fanfiction.pdfIn PDF document text
    • http://app-3null.com/voxitajuxiwurewaxerevunamw5kg4.pdfIn PDF document text
    • http://kajipim.mypressonline.com/gafemamuwesixob.pdfIn PDF document text
    • http://kebenoda.scienceontheweb.net/tuzobuwamuzilobuvakewufer.pdfIn PDF document text
    • https://cdn.sqhk.co/loziromegon/dgefM0p/rewebama.pdfIn PDF document text
    • http://artistichomesolutions.com/granny_hack_apk_mod_menu_downloadxcpgf.pdfIn PDF document text
    • http://lovojat.22web.org/lasko_tower_fan_home_depot.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tagijonegularol.myartsonline.com/20295218203.pdfIn PDF document text
    • http://vawirir.atwebpages.com/kijamewuvewoberorajesarap.pdfIn PDF document text
    • http://nudenagazosizav.epizy.com/xibutabe.pdfIn PDF document text
    • http://nareboveridur.epizy.com/26775142667.pdfIn PDF document text
    • http://zikoliduxa.atwebpages.com/rhyming_words_dictionary_free_download.pdfIn PDF document text
    • http://watekiz.rf.gd/how_to_remove_kidde_firex_smoke_alarm.pdfIn PDF document text
    • http://joriboka.epizy.com/8909462194.pdfIn PDF document text
    • http://mogewatiside.epizy.com/free_gidha_boliyan_songs.pdfIn PDF document text
    • http://bavatesivo.myartsonline.com/microelectronics_circuit_design_4th_edition_jaeger_solution_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_off0000fe7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE7D 5444 bytes
SHA-256: 9fb513fbaa84f3b01171bf0fc2f092d7d7c53ff1bf75933f1a0fe3d96b4d1f27
font_01_sfnt_off000110d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110D7 10080 bytes
SHA-256: 25a84964a1ef2c357105e114cac53e6b055d9be1187942004fbc13f879980517

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