Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc64e0cc9193661d…

MALICIOUS

PDF

49.0 KB Created: 2020-10-02 20:34:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 16c36ccfb9ededafa2698868f140ed59 SHA-1: 345863a6eb14b2bcd870d2fccae58d0d0ac5b48b SHA-256: bc64e0cc9193661d08be8a9b887721c5fe4b814e1737ae013417817bb04bba4a
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://ggtraff.ru/strik?keyword=vince+flynn+transfer+of+power+pdf In PDF document text
    • http://files.theayalas.com/uploads/1/3/2/7/132712358/noxovaguw.pdfIn PDF document text
    • http://files.channelcenter9.com/uploads/1/3/1/3/131383860/5860522.pdfIn PDF document text
    • http://files.lilogisticscenter.com/uploads/1/3/0/7/130740011/xibirafifexizeg.pdfIn PDF document text
    • http://vavomuga.havenfortots.org/uploads/1/3/0/8/130874617/neserosifip-nikuwul-kajoza.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/1ebcefd9-7af4-4879-b5a9-f43f6981376b/mopedurotiv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/912c727c-b042-4f13-a41d-3307cb8ab2a6/8936426175.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa6d13a9-6a8d-4d32-8b43-bdeffbe8ca42/61243912281.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b9f5f2d-f124-4683-a5fd-0a39d9f9662f/rojikomudowaji.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/64827ab0-03da-4aae-a038-1157198efffc/36268908610.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/529fa8a5-c1ab-441f-ab0f-264027cc8d12/kuxukemefe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e7b4beab-231b-40bb-a7c9-ba31a8685efc/favavugotewodasoposox.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8075681d-6617-4161-9eba-9730419bb437/75318291105.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/82e913b1-5d9b-4670-81e7-85715680efe8/53210425609.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/4359/7717/files/fairy_tail_meredy_voice_actor.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/8930/8064/files/fox-1a_orbital_locations.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0468/8294/7229/files/apex_us_history_quiz_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0860/4829/files/karikuvarexune.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_off00007328.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7328 5096 bytes
SHA-256: 526a7ea2a92ca97689a7f05c14203c172b06812574f53c31ba205585b5eea2f2
font_01_sfnt_off00008498.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8498 10704 bytes
SHA-256: 527c455bff9d12b33bec24755975521e285ab0ad5b09f125639b3bf6df12c6cb
font_02_sfnt_off0000a921.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA921 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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