Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b6d17aed2844717…

MALICIOUS

PDF

75.3 KB Created: 2021-02-18 23:23:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 1987563cc39916ca78b26429ad18b5c6 SHA-1: 98f8be0d66c6940cb290a3c3a3e64ba60d8e8da7 SHA-256: 5b6d17aed2844717d0a4b019ceed30f670a0381b33c82498a91860072c465e15
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is a PDF document that contains an embedded URI pointing to a suspicious domain, identified by ClamAV as Pdf.Phishing.Trojan. The document body, though heavily obfuscated, appears to be a lure related to search terms, suggesting a phishing or social engineering attempt. The presence of external URIs and the ML classifier's high confidence score indicate malicious intent, likely to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://druttle.ru/123?utm_term=burger+king+large+fries+calories+uk PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4416496/normal_5fd3cef8b2fea.pdfIn PDF document text
    • https://dolilufaxeni.weebly.com/uploads/1/3/2/6/132683246/4058362.pdfIn PDF document text
    • http://kanudivuvim.iblogger.org/abba_songs_videos_free.pdfIn PDF document text
    • https://kofitabalu.weebly.com/uploads/1/3/0/7/130775223/kaselof.pdfIn PDF document text
    • https://putukaxuke.weebly.com/uploads/1/3/1/4/131437363/weguligo_rewigimepipolin_muzupus.pdfIn PDF document text
    • https://cdn.sqhk.co/wavefekus/dJhfhi0/ftdna_coupon_2019.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477162/normal_600f64cfb6f06.pdfIn PDF document text
    • http://itravelgr.com/vocal_ease_sprayhvqbb.pdfIn PDF document text
    • http://stat-index-co.com/4553951345815qbe.pdfIn PDF document text
    • https://cdn.sqhk.co/saligoliti/jkgjghf/wozerijedulodef.pdfIn PDF document text
    • https://cdn.sqhk.co/rikopekela/bdgjfhb/xepanuwixokomanexasudozut.pdfIn PDF document text
    • https://cdn.sqhk.co/kezixowog/Ufegdie/ginezojozupoduluja.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417221/normal_5fdc70f51f1fd.pdfIn PDF document text
    • https://fabuduviwanor.weebly.com/uploads/1/3/4/7/134739750/df6944b607552e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427519/normal_602d4b9317c24.pdfIn PDF document text
    • https://vusutiti.weebly.com/uploads/1/3/4/7/134762674/cf4f0b03aae35.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/rafiralexezol/12114524536.pdfIn PDF document text
    • http://negemabubitaso.rf.gd/23423932022.pdfIn PDF document text
    • https://s3.amazonaws.com/pazatuv/29537767358.pdfIn PDF document text
    • https://s3.amazonaws.com/widofafane/cosmos_quest_mobile_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/baxunaf/44719613784.pdfIn PDF document text
    • http://tomogutirop.rf.gd/humidity_and_temperature_sensor_rht03_datasheet.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_off0000e850.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE850 5164 bytes
SHA-256: d38212d08b8e300ff469a0810f75decc5fd1ba53766eadef2c63d2ff242b8877
font_01_sfnt_off0000f9fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9FE 11068 bytes
SHA-256: e56e78ad5eb25a570a28601a29eab111b3272290ec95fb5d50a4d265adb0901f

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