Malicious PDF — malware analysis report

Static analysis result for SHA-256 09b00a43588da7a1…

MALICIOUS

PDF

94.3 KB Created: 2021-04-03 16:23:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: a747f52a28e3e61473bd5ea82757995b SHA-1: 98591815504f0f62c99435774865e80c1308216c SHA-256: 09b00a43588da7a1fc53de46e43a5c974ecf6ca24da79bfc9c6880b5f04116dd
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://dugedepap.ru/aws?utm_term=shark+sonic+duo+not+spraying PDF link annotation
    • http://jopagozopive.medianewsonline.com/ms_project_gantt_chart_formatting.pdfIn PDF document text
    • http://xonigej.mypressonline.com/what_is_a_good_modem_for_centurylink.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/8c6f8dce-3cdf-4f02-9abb-b64708fa50f8/83332941945.pdfIn PDF document text
    • https://s3.amazonaws.com/dupula/31673869166.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1128bc85-043f-4fa4-b90a-124bf913e01b/how_to_qualify_for_giving_blood.pdfIn PDF document text
    • https://s3.amazonaws.com/meludav/frankie_goes_to_hollywood_the_power_of_love_lyrics_karaoke.pdfIn PDF document text
    • https://a9750898-a066-404d-a796-54a2f5ad13bb.filesusr.com/ugd/60231a_b29095860b0a423eba8fec7f2052fe3e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wibedubosateg/imperial_beach_water_quality_report.pdfIn PDF document text
    • https://s3.amazonaws.com/mefadedosuw/fawotexewidoj.pdfIn PDF document text
    • https://s3.amazonaws.com/gateme/vuxumudesigovubenewapu.pdfIn PDF document text
    • http://jalebuvubo.myartsonline.com/gajuw.pdfIn PDF document text
    • https://704d67de-a0ba-412a-a77d-f8c4cf0d88a3.filesusr.com/ugd/a83d94_7095ebd362254a4cb993d7e73c8deaa6.pdf?index=trueIn PDF document text
    • https://dda5c79a-a75d-44d9-a006-48dec3bfe172.filesusr.com/ugd/115d6e_95046906c20f4a26aed4d4c469cd7f73.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/370cfd93-d61a-46b3-8bcc-b86260cbb173/naxezarof.pdfIn PDF document text
    • https://13a7c488-548c-4b48-b567-d2b0b9a3e1de.filesusr.com/ugd/85d67f_bec402b677c4408ca5a30443aa72c57e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/4564956d-81d0-473d-98aa-0e2f1bacb02f/walmart_brand_diaper_genie_refill.pdfIn PDF document text
    • https://s3.amazonaws.com/gixawetopoli/xupuwagijaledodiwejo.pdfIn PDF document text
    • https://s3.amazonaws.com/pogolo/how_to_learn_hieroglyphics.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df69ec89-cd01-4f32-8574-d9bf4a6f2f6a/simplifying_expressions_worksheet_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/nagev/80580575147.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011aee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AEE 5572 bytes
SHA-256: cf1a7f64f328689f53e4dc28c53df55693bda140127bab5d057b5052e0e54118
font_01_sfnt_off00012de5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DE5 11852 bytes
SHA-256: 9f84dc69c6125fc273499c0e7d33a66664075525b9b9f779c18fb6f6b798f73b
font_02_sfnt_off0001558e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1558E 16092 bytes
SHA-256: ea75db71c9df7250347a03039f742fcd189f5fc3f08964e696816fa8b5227073

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