Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ebde79bd6bc424b…

MALICIOUS

PDF

71.1 KB Created: 2021-03-28 17:24:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 66abe46c57f8415190f6e3d7bd8dbb79 SHA-1: 23420158b747192bc923ee01b93479d48a0bc408 SHA-256: 6ebde79bd6bc424b5acdc8ecd1a1c03b3231d416b26ab6ed048a7f4a8588405a
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with a critical heuristic identifying it as a 'PDF_SEO_LINK_FARM'. One of the primary external URIs points to 'dugedepap.ru', which is likely part of a phishing or content-farming operation. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://dugedepap.ru/award?keyword=mipa+cc9+pdf PDF link annotation
    • https://cdn.sqhk.co/metusoteliza/hhgjji2/70099889962.pdfIn PDF document text
    • https://cdn.sqhk.co/metevetufi/sjbjeha/lexafa.pdfIn PDF document text
    • https://cdn.sqhk.co/kakapoxavu/buDgcOt/89174680346.pdfIn PDF document text
    • http://itrom.fun/59010549618en92d.pdfIn PDF document text
    • https://cdn.sqhk.co/xavaxonad/hmihicN/54602451911.pdfIn PDF document text
    • http://visiblawty.com/109672615033fkm8.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/nisoxow/sairat_marathi_movies_free_hd_quality.pdfIn PDF document text
    • http://bufiwoneven.rf.gd/leguwagubajovi.pdfIn PDF document text
    • http://bededatesaw.epizy.com/i_am_mantra_twitter.pdfIn PDF document text
    • https://s3.amazonaws.com/jemazejodep/wow_garrison_legion_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/jagux/how_to_bypass_icloud_activation_lock_for_free_on_ipad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7bcbf2f8-3855-40d3-a35b-8639f5f1dc4c/roraxubapurimojivufetu.pdfIn PDF document text
    • https://0f0532cb-4478-41f9-91a1-cf277c4732ec.filesusr.com/ugd/8acad3_00940fce1e344de5a1c9b8284350b37f.pdf?index=trueIn PDF document text
    • https://bad3f395-1638-4667-b349-d6f934eeab49.filesusr.com/ugd/ed2d23_8ddae27438cb49a49deb856477ae4857.pdf?index=trueIn PDF document text
    • https://0b609444-e5a2-4a7e-9779-a3c6bae51a53.filesusr.com/ugd/529dbf_2917227444fb4f1ab1570db640e15408.pdf?index=trueIn PDF document text
    • https://53002a68-e35f-4167-ac88-1ab9777d7e72.filesusr.com/ugd/f5bc2a_5838bacf00604c3aa9d1f25d1afb6714.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/12d93a63-5433-4d3d-8b02-58194b2500c5/huffy_cranbrook_bike_rack.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4dfdd7c-122b-424d-ac7e-aa9cf98e8c8f/28008840713.pdfIn PDF document text
    • https://s3.amazonaws.com/tubukeganuji/51913262760.pdfIn PDF document text
    • https://s3.amazonaws.com/mekonulegipero/tudabobanibusunata.pdfIn PDF document text
    • https://c3e810f9-371e-40b9-9a0b-4695a496ec77.filesusr.com/ugd/2c7c49_ba0753a88f534c17b26161a76fa3853a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d370ed95-018b-4a4b-a221-929b34fab9db/ravpower_fast_wireless_charger_blinking_red_light.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_off0000db1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB1B 5004 bytes
SHA-256: ec064a5555b80ef14282a179ce6ecf2368706fce90c71490ec29edcc819306a2
font_01_sfnt_off0000ec4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC4A 10276 bytes
SHA-256: c01c020c2f91c9a129eda780a5b0ad4bddeab9ac570939facda75432cc893005

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