Malicious PDF — malware analysis report

Static analysis result for SHA-256 c787c9cf854cbd44…

MALICIOUS

PDF

78.1 KB Created: 2021-03-25 06:58:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: d3bcdfbe9ccafd3ada4c489ce4f6b8e0 SHA-1: 68b30d480eca5b40a21525948654f225efa683ba SHA-256: c787c9cf854cbd44f6bc5f6f39386eb8d81af53987319f0ffb936601a8eac8ee
156 Risk Score

Malware Insights

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

The PDF contains a link farm designed to mimic search engine results, directing users to a malicious domain. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The embedded URL is the primary indicator of compromise, suggesting a redirection to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • 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.
  • 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://jacksth.ru/wix?keyword=virtual+hip+replacement+surgery+worksheet+answers PDF link annotation
    • https://cdn.sqhk.co/delobepaziw/fgjhcig/inside_out_music_score.pdfIn PDF document text
    • http://dupuladusudired.mypressonline.com/resistor_color_code_app_ios.pdfIn PDF document text
    • http://xejopegig.mypressonline.com/washington_gas_customer_service_number_dc.pdfIn PDF document text
    • https://cdn.sqhk.co/fumamimed/eq6gcmg/marvel_contest_of_champions_tier_list_august_2020.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371010/normal_60076f094911f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488332/normal_6051f57152e36.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491173/normal_600f7a6325fd8.pdfIn PDF document text
    • https://cdn.sqhk.co/mudaxomemut/jgljicT/noxezebis.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473622/normal_6005264a0cf5f.pdfIn PDF document text
    • http://mazikopipovix.mywebcommunity.org/cause_and_effect_reasoning_tricks.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://01c4c9a3-ee74-4db9-a65d-799443b8dbf1.filesusr.com/ugd/a64c8c_df5add94b43d47f78d9b8f4930c675d0.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vovuzize/what_are_the_steps_in_training_and_development_process.pdfIn PDF document text
    • https://s3.amazonaws.com/bupesejirijejus/drayton_digistat_30002_user_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/jojitagifuva/psychology_of_religion_phd.pdfIn PDF document text
    • https://s3.amazonaws.com/woxojuxafopuv/61461238406.pdfIn PDF document text
    • https://s3.amazonaws.com/muxegeza/zizujoxebitupafa.pdfIn PDF document text
    • https://edcd8f26-5265-4947-b9fd-144990f7a7d1.filesusr.com/ugd/55f640_4e351d3b887a4fbaa1829bf648c9d79e.pdf?index=trueIn PDF document text
    • https://97a45c9e-1ab5-462a-bfe2-fded34b9a8b9.filesusr.com/ugd/b50c55_bdb8d87ddb344b77a8a537e98214dc16.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/povodijirig/18103946446.pdfIn PDF document text
    • https://s3.amazonaws.com/xasovewipeje/heroes_of_olympus_memes_tumblr.pdfIn PDF document text
    • https://s3.amazonaws.com/fusopoxipo/bekizokikefikukepugogoto.pdfIn PDF document text
    • http://furafep.onlinewebshop.net/king_james_bible_download_free.pdfIn PDF document text
    • https://5634f520-c25d-421d-ab67-3d94505d13cb.filesusr.com/ugd/1b85ab_76ec5cc7d9384d6ca472a8b3bf88584d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dutimajizowa/common_purslane_nutritional_information.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_off0000f30b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF30B 5572 bytes
SHA-256: 0ca1ea9d3b0c7af4dd363d5c8163cf7414943c727d50e4c6629ba2dcfbd5e7b4
font_01_sfnt_off000105e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105E6 10828 bytes
SHA-256: 835b5f3149d1eee4cdf95a036beec1c8adce62d637aef7890074b52c9280a7e1

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