Malicious PDF — malware analysis report

Static analysis result for SHA-256 648da4e48d14397a…

MALICIOUS

PDF

67.9 KB Created: 2020-11-21 07:06:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 13d1a6a08d1ba876a403631074aae235 SHA-1: d224d6d2c710d0cfe436be4c31bdc9c9a95b5c65 SHA-256: 648da4e48d14397a08fbbe7a4062b6ca7e70ea42d05ac562c2ecc10b8c3a23e4
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to benign-looking PDFs, suggesting a link farm or SEO manipulation tactic. One of the primary external links, 'https://trafftec.ru/123?utm_term=tank+trouble+2+unblocked+games+66', is likely intended to lead users to a malicious site. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware delivery.

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://trafftec.ru/123?utm_term=tank+trouble+2+unblocked+games+66 PDF link annotation
    • https://gozikiri.weebly.com/uploads/1/3/4/4/134493270/zibinul.pdfIn PDF document text
    • https://ditiwudo.weebly.com/uploads/1/3/1/4/131452947/e0431255f6.pdfIn PDF document text
    • https://bajazari.weebly.com/uploads/1/3/4/3/134314741/7459516.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/gedimuta/javascript_promise_vs_callback_performance.pdfIn PDF document text
    • https://s3.amazonaws.com/jezekemunidup/analisis_de_a_la_deriva_horacio_quiroga.pdfIn PDF document text
    • https://s3.amazonaws.com/garorowa/earthbound_songs_roblox_id.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b53ba90c-a1da-4dac-965c-23d43f17e0c8/zubituratadogenovuberifu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b5b8c99-29c3-4955-9fc0-19ae5761be7c/padif.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e7ad70d8-fa81-4b4d-8938-e1bee6d3f795/que_significa_soar_con_uniforme_de_policia.pdfIn PDF document text
    • https://s3.amazonaws.com/faluzotixupi/3181624046.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96a34402-e192-4dd8-9293-0998997bee31/rupijuvewudubajadek.pdfIn PDF document text
    • https://s3.amazonaws.com/jizubisetebof/single_bed_sheet_cotton.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c6321d9-bac8-4000-abd2-4fe06571742b/jozimekafufisulib.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8f32f77-0288-462f-af95-1f604f96e114/the_making_of_a_poem.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b78de293-acb1-4ede-80e1-712387aa3a2f/how_to_pronounce_poop_in_spanish.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7af7dd44-590b-4382-9ee1-80016612c97c/gavakugib.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a58ad2af-5c73-4c44-8e8d-3ae20b38288e/wezevifufi.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_off0000ce2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE2A 5700 bytes
SHA-256: 18881f70384d078290fba33f09ee706b2ffcf594376ab31ff59509f4a68b9bc9
font_01_sfnt_off0000e177.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE177 9872 bytes
SHA-256: 39c0da825f7c23dda42ad18e9a83088805d37154a0567484b0df0f11e44c47f5

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