Malicious PDF — malware analysis report

Static analysis result for SHA-256 29d1110fcbc16ac6…

MALICIOUS

PDF

71.8 KB Created: 2021-02-25 15:53:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 365b887fab3fbcdb685c29bb40d18669 SHA-1: f585cbd210d3dd1745c4e2b6c44980084e31e0a5 SHA-256: 29d1110fcbc16ac60e2d2c717495ff2ff0ef69640936ee15cd41ed0d4c24c570
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://druttle.ru/wb?keyword=a%20midsummer%20night PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4376120/normal_600ed176d62ea.pdfIn PDF document text
    • https://duvutonog.weebly.com/uploads/1/3/6/0/136020002/dotosunibol.pdfIn PDF document text
    • https://cdn.sqhk.co/busumodofu/FIhavjc/22918820700.pdfIn PDF document text
    • http://lnstagram-blue-ticks.com/97279613669vr6j2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490542/normal_5fd0e5af3aa93.pdfIn PDF document text
    • https://cdn.sqhk.co/zebimapajod/7cggjdE/motu_patlu_kungfu_hong_kong_movie.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470962/normal_5feb1a0a150e6.pdfIn PDF document text
    • https://cdn.sqhk.co/runolisor/ojadjaI/recipes_with_sugar_free_jello_pudding.pdfIn PDF document text
    • https://cdn.sqhk.co/wupofolizaj/9jghegc/hopper_animal_crossing_new_horizons.pdfIn PDF document text
    • https://cdn.sqhk.co/kupulifip/jj4jchf/vurul.pdfIn PDF document text
    • https://gewukojinita.weebly.com/uploads/1/3/2/7/132712116/sabudazigoni.pdfIn PDF document text
    • https://cdn.sqhk.co/xuvisisitinu/FInggha/max_air_bmx_mod_apk_download.pdfIn PDF document text
    • https://cdn.sqhk.co/pivugisaxap/ciijfge/g_switch_2_armor_games_unblocked.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497071/normal_5fd314b79af77.pdfIn PDF document text
    • http://stylecurtains.com/wovafebolnxv18.pdfIn PDF document text
    • https://cdn.sqhk.co/jogekiluse/oHWibgK/blue_bottle_fly_spikes.pdfIn PDF document text
    • https://cdn.sqhk.co/mitugejaxel/i1jeiih/timivo.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/tumasun/epidural_catheter_removal_guidelines_asra.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_off0000dd00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD00 5548 bytes
SHA-256: a93856d454298b80abb2c440a46668f00d874da3009c70db17ecdb7c62fb51e5
font_01_sfnt_off0000efc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFC5 10116 bytes
SHA-256: 5aa7da09fcde723ff408ee92422d72f6219be93740a8b54bc7b0b9b1f9cf14ae

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