Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e01b586872998ce…

MALICIOUS

PDF

73.6 KB Created: 2020-12-31 06:19:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 39fbb42377cfbc1d4c93dc98d93d5166 SHA-1: 220ffcdbb9e444a2037ef7c9a9d204620c0d1d83 SHA-256: 2e01b586872998ce71ce87f3599e89c46f1b9a46121d9be352bb9c121bd9767e
196 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including ClamAV and an ML classifier. It contains a large number of external links, many of which point to SEO redirectors, suggesting a link farm or phishing attempt. The primary URL identified is 'https://traffset.ru/wb?keyword=spinner.%20io%20free%20game', which is likely used to direct users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://traffset.ru/wb?keyword=spinner.%20io%20free%20game PDF link annotation
    • https://kekofazejigax.weebly.com/uploads/1/3/4/6/134600595/fogixademul.pdfIn PDF document text
    • https://dugilosokufaku.weebly.com/uploads/1/3/4/6/134610324/sexawili.pdfIn PDF document text
    • https://kolerekum.weebly.com/uploads/1/3/4/3/134350376/juvarerofudokijubur.pdfIn PDF document text
    • https://kuxaxamolexude.weebly.com/uploads/1/3/4/8/134869233/6708585.pdfIn PDF document text
    • https://razosuxox.weebly.com/uploads/1/3/4/7/134719946/zufofukofojisegig.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/feborobegibew/going_to_california_sheet_music.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af799bf3-b6c9-43f3-8d76-9752af045ed1/download_traffic_rider_mod_apk_1.61.pdfIn PDF document text
    • https://s3.amazonaws.com/defipedibe/4th_job_advancement.pdfIn PDF document text
    • https://s3.amazonaws.com/nolomuxuma/xuwelidinubobefisesa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c60728d-ce0e-4d8d-b3f3-f0abb3381e0a/jaludigawugumewapuparo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4088596-2661-43cb-aed1-a853720c048e/77532313102.pdfIn PDF document text
    • https://s3.amazonaws.com/bovenotojitowe/english-_tagalog_dictionary_application_free.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_off0000e2f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2F1 5144 bytes
SHA-256: 8f2bc7b496dc952b31346ee51d2d0d70c5ddc2528c6725b5ca795363a9ad7905
font_01_sfnt_off0000f469.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF469 11064 bytes
SHA-256: 8c216031a779bbe355c77f4b0e0296ec939c273e95f31a399a2b597a1efca75b

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