Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef7a5b11084ee36d…

MALICIOUS

PDF

72.0 KB Created: 2021-02-27 04:48:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: fc075d4c6db2330eeba7846d12c56ca4 SHA-1: cb8b4e4d0c788a73e2e79db7fa3e90e3815b4ada SHA-256: ef7a5b11084ee36d8d9d911213efc11b8a3ee3ffd86284c743aa66ce37ec779c
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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://jottigo.ru/award?keyword=whirlpool+wfc7500vw+problems PDF link annotation
    • http://sovetnik53.ru/introduccion_a_las_relaciones_internacionales34anm.pdfIn PDF document text
    • https://cdn.sqhk.co/fijajiles/gzljcjc/five_nights_at_freddy_s_4_unblocked.pdfIn PDF document text
    • https://cdn.sqhk.co/puxolika/igi3ETf/virgin_mobile_ksa_balance_check_number.pdfIn PDF document text
    • http://laxana.ru/hayward_pool_heater_error_message_1f3hzct.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460944/normal_6018b11eab19b.pdfIn PDF document text
    • https://cdn.sqhk.co/sibamoxa/oqjcJrY/jewels_star_match_3.pdfIn PDF document text
    • https://pilogowizimofog.weebly.com/uploads/1/3/4/6/134604263/rijudevosi_xalotozokemuwek_deguwemofume.pdfIn PDF document text
    • https://cdn.sqhk.co/kepebeso/idjbzSO/zarchiver_app_free_download_for_android.pdfIn PDF document text
    • https://cdn.sqhk.co/merabuvi/Zcjjqjc/30511862687.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450034/normal_6033fb2db0707.pdfIn PDF document text
    • http://sdek-24.cc/lisapakebzh1my.pdfIn PDF document text
    • https://cdn.sqhk.co/pikukafil/zgeihoL/jack_s_world_locations.pdfIn PDF document text
    • https://cdn.sqhk.co/zifuvifiweva/cTlAhjf/3166142733.pdfIn PDF document text
    • https://vamarimorojikav.weebly.com/uploads/1/3/4/6/134640123/3133ecac4e02ba1.pdfIn PDF document text
    • http://aazzzry.space/tamil_catholic_bible_download2v8q6.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/pazerogasarinu/lulojugorodejuwewugop.pdfIn PDF document text
    • https://s3.amazonaws.com/tanikanaw/avery_index_cards_template_3x5.pdfIn PDF document text
    • https://s3.amazonaws.com/zarusegibitumet/nnmc_wramc_wound_dressing_selection_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/fajujiju/free_business_plan_template_uk_small_business.pdfIn PDF document text
    • https://s3.amazonaws.com/rebesudanolo/zaitoon_ka_encyclopedia_urdu_free.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_off0000daa4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAA4 5696 bytes
SHA-256: 771cab053ec9c9bc1c58d7eb74246993f28b964685c39800617a0723a90a4a5f
font_01_sfnt_off0000ee09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE09 10292 bytes
SHA-256: 7520556942e73033e642431a762b4b36d639993e4b9c5254ef4cfbf3875f41b9

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