Malicious PDF — malware analysis report

Static analysis result for SHA-256 cfac0987b22ccfb2…

MALICIOUS

PDF

78.4 KB Created: 2021-03-02 16:35:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 0c75f70f123fbb61c83f3c85456041bc SHA-1: 24be316ac3976b73930513a21e4e194942034882 SHA-256: cfac0987b22ccfb20fc40186fc11612cb8e64b9028de82a041d82657a11a13a5
96 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for an external URI pointing to a suspicious domain, and the ClamAV detection indicates it is a phishing trojan. The document body, though heavily obfuscated, appears to be related to printer instructions, likely a lure. The embedded URL is the primary indicator of malicious intent, likely leading to a phishing or malware download site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://druttle.ru/123?utm_term=how+to+thread+a+brother+xl+5130 PDF link annotation
    • https://nutotawi.weebly.com/uploads/1/3/0/8/130813366/xelazuxeji_tulanu.pdfIn PDF document text
    • http://vufajed.getenjoyment.net/40220635434.pdfIn PDF document text
    • http://vevufilusik.scienceontheweb.net/72143872984.pdfIn PDF document text
    • http://mademupo.22web.org/fuvitipawoparebem.pdfIn PDF document text
    • https://xatoxelal.weebly.com/uploads/1/3/1/4/131482937/malovesabasifi_kebenazixiwu_jisukimesasezu_xoxorisijodu.pdfIn PDF document text
    • http://mekatososa.iblogger.org/figures_of_speech_worksheet_with_answers.pdfIn PDF document text
    • http://nogurufegu.mygamesonline.org/20353860161.pdfIn PDF document text
    • http://beviluxenumiliv.mywebcommunity.org/how_to_file_business_taxes_in_florida.pdfIn PDF document text
    • http://tuduvodakep.mypressonline.com/kuraxasorofoliwu.pdfIn PDF document text
    • http://woziwowariv.sportsontheweb.net/53751518277.pdfIn PDF document text
    • http://xexulijupofa.iblogger.org/minecraft_free_pc_tlauncher.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/suximawo/excellence_el_carmen_reviews.pdfIn PDF document text
    • https://s3.amazonaws.com/punurum/sewebenomadeparad.pdfIn PDF document text
    • http://wipadafefuxasi.onlinewebshop.net/imaginarium_polar_express_train_set_instructions.pdfIn PDF document text
    • https://s3.amazonaws.com/xovekolamoxe/cantate_tutti_dawid_podsiado.pdfIn PDF document text
    • http://zipemoluligera.myartsonline.com/what_are_the_steps_of_usps_tracking.pdfIn PDF document text
    • http://rotufixijisadi.onlinewebshop.net/64869523353.pdfIn PDF document text
    • https://s3.amazonaws.com/legobegutulo/what_is_new_in_premiere_pro_2020.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_off0000f717.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF717 5480 bytes
SHA-256: d534bd99af6d32a2d6879220f011e4976695a84b138c52a4dc462a235e2a4605
font_01_sfnt_off000109c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109C8 9972 bytes
SHA-256: ba25034cd437b08142efd53fd3224cedce9bb038e9376ecf244d572149eca6f3

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