Malicious PDF — malware analysis report

Static analysis result for SHA-256 f97b980d80757e76…

MALICIOUS

PDF

77.7 KB Created: 2021-03-15 22:09:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 16bcf5a6861103f578b0a6a51ab0f304 SHA-1: 63bf5e05652ee2e7c04c5309351681ddc9707e03 SHA-256: f97b980d80757e76b2724718012ca38de56efbc4c2b6ac93faf10b23df14dfef
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier. It contains an embedded URI pointing to 'https://dafemum.ru/123?utm_term=tesco+questionnaire+answers+crumpets', which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, contains text related to 'Tesco questionnaire answers', suggesting a lure to entice users to click the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://dafemum.ru/123?utm_term=tesco+questionnaire+answers+crumpets PDF link annotation
    • https://cdn.sqhk.co/fagaluwozez/gh1ibgl/31361430726.pdfIn PDF document text
    • http://1-bog.ru/bebebupabeperufedigingorau.pdfIn PDF document text
    • https://cdn.sqhk.co/dusaradezat/fDIji6v/minecraft_how_to_make_netherite_pickaxe.pdfIn PDF document text
    • http://dimax-matrasy.ru/blackberry_classic_2020_buypv9sm.pdfIn PDF document text
    • https://cdn.sqhk.co/mifodirula/LjdMYhf/58609168940.pdfIn PDF document text
    • https://cdn.sqhk.co/feketukadoz/hgdjgdd/super_slime_simulator_free_games.pdfIn PDF document text
    • http://kolunikikirade.22web.org/medupasajekuzetedalunisun.pdfIn PDF document text
    • https://cdn.sqhk.co/diwomijo/eG4gfhc/city_racing_3d_game_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/lopovekis/PnhdDVd/87285560541.pdfIn PDF document text
    • http://bu-markett.com/zotejuvuzolagulk0yv.pdfIn PDF document text
    • https://cdn.sqhk.co/rifusofuwedi/CUjgDKk/521195631.pdfIn PDF document text
    • http://bu-markett.com/xurarobasezenojamerazivegaxma.pdfIn PDF document text
    • https://cdn.sqhk.co/rogotojuseb/jcgdjcz/mutants_genetic_gladiators_black_hole_recipes_2_ingredients.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/327005d1-7f18-4fdd-a026-e714b60c1e78/gefaxemoxo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/546bf247-fdfc-4586-b2d8-e326ee0e6257/bedijato.pdfIn PDF document text
    • http://xozesaf.rf.gd/92917161907.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c93768e-b586-41be-b215-c31ef29253f4/mowonuwedukifutalir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/10a6d828-1714-4af3-82ac-4c1824297b4c/1938953583.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9124e706-8d8f-4247-95dc-1a4f068e1b1c/how_to_lead_a_team_in_retail.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc37a28f-9d97-4f9e-81ab-74197321a92f/moca_test_instructions_video.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de8b023f-9894-4c06-affd-c620cdf48da6/what_is_the_basic_model_of_strategic_management.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0bd71ce0-8c67-428e-ae83-02aced76f42e/malenajiliwobu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3de4c04c-e32d-4556-b97a-e28bf4def6b2/plc_programming_training_centre.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_off0000f13b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF13B 5216 bytes
SHA-256: b99b8204b83c1de1ab6a3465c03e2a0f5643b219dd492fa7decb40062c14ae77
font_01_sfnt_off000102fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102FC 11264 bytes
SHA-256: 6d26b1a5ea093d5a3fd2e9f19c5e2e5aa72ad7cd622ae02bf7daf25752c60df8

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