Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6ea988c05f55d60…

MALICIOUS

PDF

75.4 KB Created: 2021-03-23 05:12:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 283af6ad5c9f72867ebf42f1685a1542 SHA-1: 7acce8890fc6f603f5d78d31153b9134e25ab4ae SHA-256: a6ea988c05f55d604d18eca5a93e77de7d1f882ed9318bdc6d54dc4a530f5d8b
104 Risk Score

Malware Insights

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

The PDF file contains XFA form elements and an embedded URI pointing to a suspicious domain, indicating a phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The document body text, though partially garbled, includes "Love birds sounds", likely a lure to encourage interaction with the embedded link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • XFA form low PDF_XFA
    PDF uses XML Forms Architecture — can contain script logic
  • 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://botokaw.ru/123?utm_term=love+birds+sounds
    • http://vuwevemup.22web.org/english_words_list_with_telugu_meaning.pdf
    • http://dusibarupuguli.medianewsonline.com/historia_del_genero_narrativo.pdf
    • http://kivesiso.iblogger.org/english_to_russian_dictionary_free_download.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/nitatotol/xexarobedusasuta.pdf
    • https://41d9b059-0b17-466b-96e6-f31a3f3e9b19.filesusr.com/ugd/f1ead9_24f8626cb21f4defadec60d9bb05ccbf.pdf?index=true
    • https://6d5fec37-5936-4ae8-8938-03a86e982f09.filesusr.com/ugd/d4da64_6900dcef534341ba900a56ed48b85ccc.pdf?index=true
    • https://uploads.strikinglycdn.com/files/6666ecbd-095d-4727-941a-acfcefdd8316/hallmark_twas_the_night_before_christmas_pop_up_book_1988.pdf
    • https://170a7d3c-74f0-42f5-9ead-98ae292a4922.filesusr.com/ugd/a18aa6_dcfb87ba2dfe494d9ad61a39f7ea8072.pdf?index=true
    • https://uploads.strikinglycdn.com/files/a5a2885d-30a5-4f65-abf3-9402e8640ee4/70162679878.pdf
    • https://s3.amazonaws.com/bisapovepizaj/asos_curve_jeans_size_guide.pdf
    • https://uploads.strikinglycdn.com/files/17616b9a-d181-40d7-aece-4a467f6871ad/rubajuwuvamafupobob.pdf
    • https://s3.amazonaws.com/sasufufa/new_catholic_encyclopedia_vol_1.pdf
    • https://uploads.strikinglycdn.com/files/da9a80bb-2c01-4c11-b5a5-e3cc88e7f115/42249766730.pdf
    • https://37e0f79d-b0c1-4727-b76d-5b759c81288f.filesusr.com/ugd/9c66ff_3955b412cee34145b3e4cd88d605e00c.pdf?index=true
    • https://99442e0c-e188-470f-b1e9-a2082f9e7f28.filesusr.com/ugd/2274a7_e74ee5fe748e479ba9d390475ad21425.pdf?index=true
    • https://s3.amazonaws.com/tosevud/skyrim_alchemy_guide_ingredient_effects.pdf
    • http://gofosuxubajo.epizy.com/67433242270.pdf
    • https://s3.amazonaws.com/bibejovixapis/brooklyn_bedding_sheets_reviews.pdf
    • http://ruzojonawa.epizy.com/bixolazezadajetivida.pdf
    • http://xevijojikutep.onlinewebshop.net/bowimuvemuxabosebofive.pdf
    • http://vefogisoj.epizy.com/xezuzaroledekele.pdf
    • http://joriboka.epizy.com/harry_potter_final_scene_19_years_later.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb0a.bin
4978efb68ed8136e9cdda2a3d62090780b9acfd99210cd9c5b21097f24bb6625		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEB0A 4716 bytes
font_01_sfnt_off0000fb26.bin
daedcd86b7e06f9e6d627039f44300a78521c772c3e8239f6384faa9663ee4bb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFB26 10888 bytes

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