Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5fbf430b6e27484…

MALICIOUS

PDF

82.9 KB Created: 2021-03-14 19:43:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: ca3c6228ee782efc5933f962b107470a SHA-1: 3c63cf3989ca81c6004bbb2e9aba2b252bf15651 SHA-256: c5fbf430b6e27484a1f49ad8b6dc64498e147fe39c66c1cdae0519ab5f0f57ee
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, identified by ClamAV as Pdf.Phishing.Trojan. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, appears to be a lure related to 'bacterial growth curves' to entice users to click the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/123?utm_term=curva+de+crecimiento+bacteriano+microbiologia+pdf PDF link annotation
    • https://cdn.sqhk.co/gabironero/iifhghg/gezanukigujolanimig.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472768/normal_603076b1a5e16.pdfIn PDF document text
    • https://cdn.sqhk.co/farafakilof/geshawu/71173920353.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407299/normal_5ff4d0759c6e0.pdfIn PDF document text
    • https://cdn.sqhk.co/wumerelup/e8AT3ih/20170598644.pdfIn PDF document text
    • https://cdn.sqhk.co/xororasomig/jjeogcy/marketing_plan_pitch_deck_examples.pdfIn PDF document text
    • https://cdn.sqhk.co/kisasizaro/shgziix/music_video_maker_software_for_pc.pdfIn PDF document text
    • https://cdn.sqhk.co/baxemazisod/jaibYjc/loop_diuretic_conversion_iv_to_po.pdfIn PDF document text
    • https://cdn.sqhk.co/wanukawuwota/kihNqKT/78992183517.pdfIn PDF document text
    • https://cdn.sqhk.co/menaleser/fGTNgfC/ark_private_server_character.pdfIn PDF document text
    • https://cdn.sqhk.co/velabolo/ihagjha/bogozurewilizotuzodoxomu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376105/normal_5fdec4ad68c6c.pdfIn PDF document text
    • https://cdn.sqhk.co/wogokodu/gStihzg/fumozesoxukafoleji.pdfIn PDF document text
    • https://cdn.sqhk.co/fejovuwov/Ikhd6ig/80458759940.pdfIn PDF document text
    • https://cdn.sqhk.co/pojuzijix/hg8ihhj/defense_zone_3_ultra_hd_pc_cheat.pdfIn PDF document text
    • https://cdn.sqhk.co/ronofumito/ie772si/90s_music_black_male_artists.pdfIn PDF document text
    • https://cdn.sqhk.co/kubabulukod/GdAhbjc/zuvukukesudup.pdfIn PDF document text
    • https://cdn.sqhk.co/satijumok/6YghgiD/listing_checklist_for_realtors.pdfIn PDF document text
    • https://cdn.sqhk.co/rigizisojix/6higigi/41296132988.pdfIn PDF document text
    • http://dimanowogodado.22web.org/what_are_the_toughest_interview_questions.pdfIn PDF document text
    • https://cdn.sqhk.co/suwapipejob/hvc0Cie/knockout_fall_guys_royale_3d_calculation.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://kibululugavi.epizy.com/how_was_your_weekend_yahoo_answers.pdfIn PDF document text
    • http://zumozitaporoka.epizy.com/what_do_you_think_are_the_negative_effects_of_globalization_on_cultural_loss.pdfIn PDF document text
    • http://pekudus.rf.gd/4x6_index_cards_template.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f1a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1A5 5404 bytes
SHA-256: 4bfdde89ed362f7e4adc6adbdefa0b8426058324a04f5defdb27df4e688e21f2
font_01_sfnt_off000103fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103FA 13152 bytes
SHA-256: 6230d12edc4592caf0b2621d200e384f0abd4ba63fc767a9e610a24458e4792f
font_02_sfnt_off00012db4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DB4 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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