Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b3928208b476a4f…

MALICIOUS

PDF

63.5 KB Created: 2020-10-03 07:25:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: efe17e300af917f8f43c2f43b0ffb42a SHA-1: a4f3d77c0f5755be55d0eee24b7d3497bf1d9801 SHA-256: 9b3928208b476a4fbee9039101e25c2d68904fda13014a9342790e494a349e2d
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://cctraff.ru/strik?keyword=wallix+adminbastion+admin+guide+pdf In PDF document text
    • http://files.diekmancounseling.com/uploads/1/3/2/6/132695513/67276.pdfIn PDF document text
    • http://files.wynwhisper.com/uploads/1/3/1/0/131070611/xekedobopizoxoj_zasipop_bezomana_minivigosovilur.pdfIn PDF document text
    • http://files.paper-and-light.com/uploads/1/3/1/3/131381518/3108193.pdfIn PDF document text
    • http://files.mataochoa.com/uploads/1/3/0/8/130814297/67b66.pdfIn PDF document text
    • http://files.akademy.in/uploads/1/3/0/7/130775498/5400319.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/c624ee2b-1579-418f-b9c8-dd061ccc5de0/tuxotukojigavunep.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1a56bc7-abf5-40f7-b720-102f9d0aed1b/kuretoxomodelifulunoj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9239b2aa-14c7-41d3-8dbb-b8ce792db801/31572055364.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/840bceaa-3dfd-4cd1-844b-896c92dc5cc4/19277180282.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9b72127-1739-434b-a748-a45a592c02f3/28860398315.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c65f699-c1dc-42db-8faa-ca39968f1c4a/durikegokoka.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4164a246-b886-4917-b13d-022b87f2b0b9/dixaxivajubitagigokudetu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b2e02292-1029-41ca-9542-c1c9608f8547/vojimegegusonudoto.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/386ef57a-b06a-4c27-8995-ec7a2ffa2c85/64176842920.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/77da2b4d-18ea-48d9-98ef-c842aec179e2/wowok.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/049fc86f-ea1d-4029-a5a0-7374c9865b26/58301276111.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3fac6a6a-3af6-4cb2-b18f-64c01117bd70/9165902784.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_off0000bc62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC62 5488 bytes
SHA-256: 48950401be17bf483b182849a0b9eea11a5812b1ca0d6adf7a5b2f351cd238aa
font_01_sfnt_off0000cf0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF0E 9864 bytes
SHA-256: acf69cf1736c5defae0b2a5b7ea13bae938971e1aa49093dace5a14988d4b605

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