Malicious PDF — malware analysis report

Static analysis result for SHA-256 24f340c643d0f07a…

MALICIOUS

PDF

73.3 KB Created: 2021-03-08 19:18:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 1041a9f8ffafeff385b3d359632e9f6c SHA-1: bfc578a64319a5d3f70be15b61efcb609a3a902a SHA-256: 24f340c643d0f07a3213ed3b78a482173e90fc4484d4fe4440299fb3ab894215
96 Risk Score

Malware Insights

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

The file is a PDF document detected as malicious by ClamAV and an ML classifier. It contains an embedded URI pointing to a suspicious domain, which is likely part of a phishing attempt to trick users into submitting sensitive information. The document body is heavily obfuscated, but the presence of URLs and the overall detection suggest a malicious intent to redirect users to a phishing site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://xezojetit.ru/123?utm_term=anthem+bcbs+medication+prior+auth+form PDF link annotation
    • http://radoruraruj.22web.org/subliminal_seduction_book_review.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453528/normal_6001bbe6c7476.pdfIn PDF document text
    • https://cdn.sqhk.co/kajurineg/hdidibq/t800_cyborg_vision_arlington_arlington_tx.pdfIn PDF document text
    • http://wazixusazajafem.22web.org/gazenozifowubepab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404750/normal_603158a74152f.pdfIn PDF document text
    • https://cdn.sqhk.co/sixajuzap/bgjx8dN/voruketuvav.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446937/normal_5ff2bf9e33e2e.pdfIn PDF document text
    • https://cdn.sqhk.co/gapalagabig/bsHibuF/wood_block_sudoku_puzzle.pdfIn PDF document text
    • https://cdn.sqhk.co/xejudawadoni/ijheKct/kuxuxafarafexinuguxu.pdfIn PDF document text
    • http://wexexazemulo.iblogger.org/lifting_equipment_register_excel_template.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481273/normal_603d32e94af2f.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/xidazeze/kasoxikalisufupogojo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f7f7bab-d2da-4dc1-9897-b54a99324c96/dias_feriados_federales_2021_puerto_rico.pdfIn PDF document text
    • https://s3.amazonaws.com/bifadiwuwileji/jafukajozir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6914ff77-5c01-41cf-bfc5-ee21d0c5c455/hp_officejet_5740_e-all-in-one_printer_driver.pdfIn PDF document text
    • https://s3.amazonaws.com/taturi/nazowu.pdfIn PDF document text
    • https://s3.amazonaws.com/lowebemuwojiso/love_020_chinese_drama_songs_free.pdfIn PDF document text
    • https://s3.amazonaws.com/kaxukok/binomische_formeln_rechner_rckwrts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a1417d77-9f8b-4d0b-9138-6fe36f1cd9ef/do_you_need_swift_code_for_international_transfer.pdfIn PDF document text
    • https://s3.amazonaws.com/nawuvud/heterochromatin_formation_in_fission_yeast.pdfIn PDF document text
    • https://s3.amazonaws.com/rerinago/orchids_flower_images_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/38ee7317-d231-43af-9248-b6ec7381ff96/gefogakigedezerizofev.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_off0000e106.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE106 5492 bytes
SHA-256: 844272347416245fa441eb7828eef6c504fa27a96d9506d360710ddcd905b2f1
font_01_sfnt_off0000f383.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF383 10804 bytes
SHA-256: 574b9037a89388282eff0ade86aa192c93deb2ddbad6953762cf0ed60b0c2b46

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