Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ec3ba2a1eae524d…

MALICIOUS

PDF

74.0 KB Created: 2021-04-05 00:46:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 83beccd0ba64f1ecc87112bc323ad2c4 SHA-1: 04d1d3609a90be2e463794098cb62b3ab4dc74f6 SHA-256: 6ec3ba2a1eae524d754e29d3b3f3af1e9a66d76f93540bc3742122409b7cde95
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious intent. It contains a large number of external links, suggesting a link farm or SEO manipulation tactic. One of the primary external links points to a URL that appears to be part of a phishing or malicious content distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://jacksth.ru/strik?utm_term=how+to+code+an+auto+clicker+java PDF link annotation
    • https://cdn.sqhk.co/xewafazuk/XgfLcW1/toca_kitchen_2_online_free_no_download.pdfIn PDF document text
    • https://cdn.sqhk.co/matikefateri/jJSWZie/cosmic_year_definition_astronomy.pdfIn PDF document text
    • https://cdn.sqhk.co/mifodirula/dVgelhb/dj_name_mixer_software_pc_download.pdfIn PDF document text
    • https://cdn.sqhk.co/fifenije/jgfgcNP/auction_application_meaning.pdfIn PDF document text
    • https://cdn.sqhk.co/mevazasid/hijgjhm/nafenejib.pdfIn PDF document text
    • https://cdn.sqhk.co/tefozakozup/phdvjbd/bitmoji_extension_not_loading.pdfIn PDF document text
    • https://cdn.sqhk.co/xekiparot/Y7ihhdG/word_farm_crossword_cevaplar_135.pdfIn PDF document text
    • https://cdn.sqhk.co/lelogivotosu/haib8hi/snapchat_filter_camera_apk_download.pdfIn PDF document text
    • https://cdn.sqhk.co/lukumuzu/hbvidZO/dikibufovijimowunosetonap.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/9da16243-1829-44a8-a412-b9b29913b543/5077785231.pdfIn PDF document text
    • https://931f52e6-cb68-4a93-8e02-54808d33f8b6.filesusr.com/ugd/6290de_33c62526afdc4b1cb7189fafab8eaec8.pdf?index=trueIn PDF document text
    • http://vedomoz.rf.gd/best_arduino_nano_projects.pdfIn PDF document text
    • https://a72b158e-cead-41d6-a0b3-8518216316a4.filesusr.com/ugd/35c6e2_978172492327436fa04179e0c41ed599.pdf?index=trueIn PDF document text
    • http://tasewegevatale.rf.gd/89511399384.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/72bffa9e-79bc-4f3c-993c-16ed16670786/somiwowuzow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/69eb80ec-cbcd-437e-934c-08d043f8cb80/dijuzikugemawulubipakab.pdfIn PDF document text
    • https://87d5e434-dc39-4d64-8681-877d64e204d5.filesusr.com/ugd/5660ac_5009c8db2e234ca580badb9eb98d1f60.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/0cde49c1-2a7f-43df-8fb6-4e02c37ce24b/wogimemipamujufudu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96597704-8d92-4074-b7f9-e01cc0a6eeca/1731518932.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_off0000e1be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1BE 5008 bytes
SHA-256: 70626d99e63c26b6b0d523a9715e7165f576f2c7bb00746494c500969a05f800
font_01_sfnt_off0000f2eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2EB 11800 bytes
SHA-256: 30ac88ac82ee2619376c1ef6b5a4818da29bd769b8d733e52596a744f2999987

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