Malicious PDF — malware analysis report

Static analysis result for SHA-256 a030fcc3e2a91e62…

MALICIOUS

PDF

81.3 KB Created: 2021-04-02 14:39:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 7ca927ec0655bd9d3cedbe8c021c651e SHA-1: 5b68f2f36c591a3d171e35170181d231dc70f189 SHA-256: a030fcc3e2a91e621802ea1e740fb7bbe49ba69141678123cc5b0174ff441c23
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://pelibifir.ru/wix?keyword=bountiful+8th+ward PDF link annotation
    • https://cdn.sqhk.co/madagijoj/gi4zJ1I/fubuvu.pdfIn PDF document text
    • http://sukaxebodaruju.iblogger.org/apriori_algorithm_example.pdfIn PDF document text
    • https://cdn.sqhk.co/saxamabewido/egdZhgV/offre_d_alternance_informatique_lyon.pdfIn PDF document text
    • http://hotloveme.online/dadolewevinariluwopodajormzmcs.pdfIn PDF document text
    • http://copyrighytsupport.com/how_much_oil_goes_in_a_simpson_pressure_washerbac47.pdfIn PDF document text
    • http://matcobzor.ru/watch_pride_and_prejudice_online_with_english_subtitlespu5l5.pdfIn PDF document text
    • https://cdn.sqhk.co/nasubivapu/giwiage/88795459536.pdfIn PDF document text
    • https://cdn.sqhk.co/gidetixi/gjhaasA/welulomaverikirapabomi.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/jenisozazewubo/free_printable_reading_comprehension_worksheets_grade_4.pdfIn PDF document text
    • https://s3.amazonaws.com/wupixufekijax/common_nursing_interview_questions_and_answers_australia.pdfIn PDF document text
    • http://tobizexajivuvob.epizy.com/o_que_fazer_para_melhorar_queimadura_de_sol.pdfIn PDF document text
    • https://042e50b4-45d0-4577-915a-c14d43ab21ad.filesusr.com/ugd/18f527_d5659e2668774ec7ac7c636d63274c10.pdf?index=trueIn PDF document text
    • https://09235f31-469a-4613-94fc-36d04c1f642a.filesusr.com/ugd/8b6407_461af0e25bbd479aa0fedba9a49727ec.pdf?index=trueIn PDF document text
    • https://93641f3c-03d3-4c8c-b6db-0fd9bfabe798.filesusr.com/ugd/384ca7_83d129b6ec33446ba9539b532d3d2316.pdf?index=trueIn PDF document text
    • https://74fc1a11-d445-4ffb-bc6b-7a79e5a65a18.filesusr.com/ugd/097bd5_1904d12738ae47a292b44f6dcd09fac3.pdf?index=trueIn PDF document text
    • https://e42ce0b3-f376-4cb5-9abe-507fdbb9570c.filesusr.com/ugd/603474_800a37f639c646e8b8baa0b2560c0d13.pdf?index=trueIn PDF document text
    • http://lutubipejor.rf.gd/dorugirepanidulumesi.pdfIn PDF document text
    • https://s3.amazonaws.com/xasovewipeje/holly_jolly_christmas_clarinet_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/fifomi/how_to_sue_for_property_damage_in_nj.pdfIn PDF document text
    • https://s3.amazonaws.com/gorajikunobixi/what_is_effective_communication_in_easy_words.pdfIn PDF document text
    • https://s3.amazonaws.com/zesixefe/newman_projection_of_cyclohexane_boat_conformation.pdfIn PDF document text
    • https://s3.amazonaws.com/kewuxejikiwe/bright_line_eating_meal_plan_ideas.pdfIn PDF document text
    • https://s3.amazonaws.com/lorugipopuxe/brother_mfc-6490cw_wlan_connection_failed.pdfIn PDF document text
    • https://s3.amazonaws.com/toguvaju/the_summoning_of_everyman_sparknotes.pdfIn PDF document text
    • https://s3.amazonaws.com/libowebujakux/how_to_deactivate_car_alarm_without_key_fob.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_off0000ff59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF59 5152 bytes
SHA-256: 9433378a9489021c1ea410a24cec1aa1f62779cf08ab7b6ff4784dba55d229ab
font_01_sfnt_off000110f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110F4 10896 bytes
SHA-256: a189cbb46da8c5a4725105afdd1f58c80b004163ec081f88787f053efb40ac6d

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