Malicious PDF — malware analysis report

Static analysis result for SHA-256 d60b3f5f864d8422…

MALICIOUS

PDF

48.9 KB Created: 2020-10-07 00:46:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 19b4c5131f89bbba3a6ba5cba8499ebc SHA-1: 6c5ab36b59e008f246ad1e4e77bd51ddbf26435d SHA-256: d60b3f5f864d842298013b740af5f126eceb0c3f3d22098df1e01c52113c9bba
234 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://ggtraff.ru/strik?keyword=born+to+die+absence+remix In PDF document text
    • http://zutotaf.rkspeech.com/uploads/1/3/0/8/130874030/wetizudobilu_vemib_domuxon.pdfIn PDF document text
    • http://zabunul.mayaabasketball.com/uploads/1/3/2/8/132816117/kadumosefema.pdfIn PDF document text
    • http://basiba.paintingsbyjacquelinekottwolle.com/uploads/1/3/0/8/130874285/woxabopetululora.pdfIn PDF document text
    • http://files.tanja-frey.com/uploads/1/3/2/6/132681832/gowawekopefor_sizinavejetinog.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/6877a62c-96ef-4b96-a018-4abdad9e7866/gajifem.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f0466f35-9741-49d4-a0e1-bc91a24af257/jewaxepupofemanakip.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e63eb14-fa92-470d-af58-e0ca9408ac1d/12917923477.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a24688bd-d3c9-44f8-b69b-b609b8f6fb58/51024523670.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7cd69555-3113-4070-a6dd-46c9fe423fb1/43390852342.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a89984d5-ac24-4143-90f5-843c8e056dcd/ponamozazitefenazepizama.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad4ae99d-2a5c-44e0-a490-78184ac810c9/wazadodavaziritixuguni.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e1e8f6f-b4d0-44eb-8432-dabb8a536c60/56499685523.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd15e8ce-22e7-494a-9d09-58ad416b79f6/sapegolazopotukujubijopo.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006b25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B25 5312 bytes
SHA-256: 94f1ba746732b81356478389891c232caa803a23d4e3e31700eefd58258ed200
font_01_sfnt_off00007d17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D17 5236 bytes
SHA-256: 8683f8d1dd4afda7a928f6948e69b49c9919987fbac62787daeba9af36a72074
font_02_sfnt_off0000909b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x909B 11512 bytes
SHA-256: b129107debe4edec54dd18a657436e4ebb687402143e5c1b23e34073f2623fcb

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