Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ef50c382e6fbed7…

MALICIOUS

PDF

78.5 KB Created: 2021-02-25 01:38:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: cb75d43f1cfd3133c866678941d5e694 SHA-1: b9567894f34ed52484cf21c9746c871e32c3465a SHA-256: 0ef50c382e6fbed7397b63b7d69ad1c2a8b2defb7d77e16e5c6c4bc5632bde9f
96 Risk Score

Malware Insights

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

The PDF contains an embedded URL that mimics a search result, likely to trick the user into clicking it. ClamAV and ML classifiers strongly indicate maliciousness, and the presence of an external URI points to a phishing or credential harvesting attempt. No scripts were extracted, but the PDF structure itself is suspicious.

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://maypoin.ru/wb?keyword=bosch%20800%20series%20dishwasher%20vs%20kitchenaid PDF link annotation
    • http://bikejesoxatelo.mygamesonline.org/what_is_the_best_griddle_for_a_glass_stove_top.pdfIn PDF document text
    • https://nipawivas.weebly.com/uploads/1/3/2/6/132680981/xemufumurok.pdfIn PDF document text
    • http://zabemaladameg.medianewsonline.com/4610154515.pdfIn PDF document text
    • https://xujikipige.weebly.com/uploads/1/3/1/3/131379844/ropisigad.pdfIn PDF document text
    • http://gbo.guru/hit_or_miss_lyrics_nfg537pb.pdfIn PDF document text
    • http://didazema.mypressonline.com/zidebekututojom.pdfIn PDF document text
    • http://habirovradik.ru/twitter_user_datahtk1n.pdfIn PDF document text
    • https://cdn.sqhk.co/faxidopudome/RnQLohe/falixexerukebiweta.pdfIn PDF document text
    • http://wemuwetafivaxe.sportsontheweb.net/ruxikelixadadokofovedones.pdfIn PDF document text
    • https://xilamexazoleguj.weebly.com/uploads/1/3/2/6/132695560/9075297.pdfIn PDF document text
    • https://butopejejix.weebly.com/uploads/1/3/2/8/132814220/7831447.pdfIn PDF document text
    • http://vazawujuzu.sportsontheweb.net/zuzemor.pdfIn PDF document text
    • http://rasezatoxefu.mygamesonline.org/kenotimubaju.pdfIn PDF document text
    • http://instapriz.online/menstrual_and_ovulation_calendar4xdxc.pdfIn PDF document text
    • http://sipataj.sportsontheweb.net/chronicle_of_a_death_foretold_gender_roles_quotes.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/fadedosi/91678102233.pdfIn PDF document text
    • https://s3.amazonaws.com/widofafane/nixozijibowo.pdfIn PDF document text
    • https://s3.amazonaws.com/zifozujiwi/22877001272.pdfIn PDF document text
    • https://s3.amazonaws.com/vexosafugunu/couper_un_sous_mac.pdfIn PDF document text
    • http://girofili.myartsonline.com/how_to_play_old_game_of_life.pdfIn PDF document text
    • http://zejibanunepi.myartsonline.com/638464179.pdfIn PDF document text
    • https://s3.amazonaws.com/jasipefulaxiduj/safawuni.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_off0000f5bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5BD 5596 bytes
SHA-256: b8ec8afa34c042a51b08710be9994672da2344fc0b5f58aa121862f29dc54401
font_01_sfnt_off000108d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108D8 10308 bytes
SHA-256: c1173a8b7edd8c195ebe5417a5d9d11a950149ecbc267b1b2e5e0f4274e3eed0

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