Malicious PDF — malware analysis report

Static analysis result for SHA-256 c63824560009791d…

MALICIOUS

PDF

90.9 KB Created: 2021-03-21 20:46:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: c99774c0e7de1f754e15421d5fc2938c SHA-1: 4d96db65f0e98ad0562dc285b8a329891dbc3123 SHA-256: c63824560009791d8b017ec07b96d6e84082619134591737b48ce589788601be
96 Risk Score

Malware Insights

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

The file is a PDF document identified as malicious by ML classifiers and ClamAV. It contains an embedded URI pointing to 'https://kuzutuzo.ru/wix?keyword=escape+if+you+can+1+guide', which is likely a phishing or malware distribution lure. The document body, though heavily obfuscated, contains text fragments related to 'wkhtmltopdf' and a date, suggesting it might be a generated document used to mask malicious intent. No scripts were extracted, but the presence of external URLs and the ML detection strongly indicate a malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://kuzutuzo.ru/wix?keyword=escape+if+you+can+1+guide PDF link annotation
    • http://dokakepitizix.medianewsonline.com/8790703844.pdfIn PDF document text
    • https://powilumoratome.weebly.com/uploads/1/3/4/3/134368047/duvetenarasigof.pdfIn PDF document text
    • https://zifekibovaliw.weebly.com/uploads/1/3/1/8/131871714/ribigawakatevopuneti.pdfIn PDF document text
    • https://gibiboxovozigux.weebly.com/uploads/1/3/4/7/134722082/5909864.pdfIn PDF document text
    • http://lamisorosasam.mywebcommunity.org/zifusova.pdfIn PDF document text
    • http://wisujaf.iblogger.org/does_samsung_mu7000_support_hdr10.pdfIn PDF document text
    • https://ranibifuvif.weebly.com/uploads/1/3/1/3/131381542/wunud.pdfIn PDF document text
    • http://sabumow.mygamesonline.org/98847814338.pdfIn PDF document text
    • http://rawoxaxevog.mygamesonline.org/salezezodowiboxapovib.pdfIn PDF document text
    • http://rixujewo.getenjoyment.net/54868960856.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://namakanexir.atwebpages.com/dust_in_the_wind_partitura_guitarra.pdfIn PDF document text
    • https://s3.amazonaws.com/gidibesuxi/28077759611.pdfIn PDF document text
    • https://s3.amazonaws.com/povelenavuviw/85148360720.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6b5596b-06e9-44b9-a230-3d076884ac52/what_dba_is_a_quiet_generator.pdfIn PDF document text
    • http://judiserod.onlinewebshop.net/how_to_find_samsung_tv_remote_code.pdfIn PDF document text
    • http://tiluxusimutine.atwebpages.com/the_world_in_2020_economist_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/purawuma/atharva_tamil_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/rovikibixu/movie_maker_pro_reviews.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/05d79279-0d3e-4f55-81a8-168f891964d4/dejuxinapovanututiz.pdfIn PDF document text
    • https://s3.amazonaws.com/bejenosugede/gufejorijodakufap.pdfIn PDF document text
    • http://xumupeg.rf.gd/chekka_bhajana_geethalu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c06f599-6d68-47ad-948b-e1c5883f8e1d/duraheat_kerosene_heater_wick_replacement_instructions.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011c97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C97 5304 bytes
SHA-256: 2f8160a069a4660c1fb1cf3c59602d9733d7e41088ef8856f3eae2bdb00d29ed
font_01_sfnt_off00012ecf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12ECF 1800 bytes
SHA-256: e9a5a1f6ed95b1e3669933bb00002ad32a1708c3e0b735191cad5e02368a6c7d
font_02_sfnt_off0001375d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1375D 11652 bytes
SHA-256: 71b2f1a33ed84d32e70bc88fc355b05fc104a6da640c8922ebefafe61557b18b

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