Malicious PDF — malware analysis report

Static analysis result for SHA-256 94e08f05c739db95…

MALICIOUS

PDF

76.5 KB Created: 2021-05-23 10:52:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 1d336903399a300261af2878d923962d SHA-1: 8ed1b8a2922d6d5eff0a28f8144e62bf0143136b SHA-256: 94e08f05c739db9543636cece5b40a099f8f50a6279793d80f7c0c15bfdbc856
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, specifically identified as a phishing trojan. It contains an embedded external URI pointing to 'maypoin.ru', which is likely intended to redirect the user to a malicious site or download further malware. The PDF's structure and the presence of an external URI suggest a phishing or malware distribution attempt, likely delivered via email as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://maypoin.ru/strik?utm_term=algebra+1+workbook+pdf+with+answers PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4404965/normal_600029de532aa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4506063/normal_5fcf0d92aaeac.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/a2bf3c8c-d000-4e38-ba2f-51576fff336f/57432783197.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0e841e2-7aae-4c2d-8ff9-8f69394f0586/what_level_is_diary_of_a_wimpy_kid_the_meltdown.pdfIn PDF document text
    • https://s3.amazonaws.com/bitajemisajoz/65452095080.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e63b879a-bcbb-4fda-9d61-898d4e398835/xopesowe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e785a37e-416f-4b39-bf93-1311f50ace81/jematobazun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b51197a-bf62-4c40-907f-0f7880553269/kyocera_fs-1135mfp_troubleshooting.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxalowafokuvo/26443418091.pdfIn PDF document text
    • https://s3.amazonaws.com/zuvovoxigumuz/nanimef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/27b98e6f-9370-49bf-b2dd-76a22139c95b/85547008557.pdfIn PDF document text
    • https://s3.amazonaws.com/supefujoxopubu/53609868587.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/373060a4-1778-474b-86f9-de444da32e26/poxigofilofewaxifofo.pdfIn PDF document text
    • https://s3.amazonaws.com/pojikovewijeja/non-technical_writing_sample.pdfIn PDF document text
    • https://s3.amazonaws.com/jeworurowam/nunakomejo.pdfIn PDF document text
    • https://s3.amazonaws.com/wurivuve/79940886910.pdfIn PDF document text
    • https://s3.amazonaws.com/sefepugolupalax/how_does_a_capacitive_pressure_transducer_work.pdfIn PDF document text
    • https://s3.amazonaws.com/satudifin/kenmore_elite_french_door_refrigerator_not_cooling.pdfIn PDF document text
    • https://s3.amazonaws.com/mozedijiz/datavebokogabu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3fd318e2-b2ef-41c8-999a-b7eeb44a3ead/que_dia_inicia_el_otoo_en_mexico.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8af57374-39e9-4bc2-ac71-f1189fd2345f/77712272446.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f0a046cf-f19e-437c-9b14-89188a4a29df/can_you_do_shadows_of_evil_easter_egg_solo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f409ffe-587b-4157-8c02-43f770974b7d/babipuxemobigejirexa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bca0f18d-f2b3-49df-ab70-0c8d06195f90/60629099289.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6dda5e46-70a3-4328-8245-d159804e27cd/wenadofowixarogujejo.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_off0000ea43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA43 5640 bytes
SHA-256: 95cb384440456abd6b5d8b86dcc5364f6a1b751e5099826fe15ab90d67cffe99
font_01_sfnt_off0000fd84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD84 11408 bytes
SHA-256: ec15fb31d2575213f209b0edd4ec4c96bb6924303ab192329cfcdc203742f3e6

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