Malicious PDF — malware analysis report

Static analysis result for SHA-256 5886d8dd160276fa…

MALICIOUS

PDF

45.0 KB Created: 2020-10-08 22:54:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: e6554497bd759c8abbc6b07d617f7513 SHA-1: f036f309e900fd006a719fa4ab6fc93c92da28b2 SHA-256: 5886d8dd160276fa0a12db98437cb872ec4f6edc99830d858d85a22ae75ab0df
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://ttraff.club/pify?keyword=azeroth+auto+pilot+garrison In PDF document text
    • http://luxolu.consolidatedpropertyservices.org/uploads/1/3/1/4/131438580/7757601.pdfIn PDF document text
    • http://files.earlyhorizons.com/uploads/1/3/1/4/131406800/jusazeliwa.pdfIn PDF document text
    • http://files.herefordshirefencingclub.co.uk/uploads/1/3/2/8/132815750/goxaguvagujit_xagumirusu_raparokazux.pdfIn PDF document text
    • http://tizemujuv.pathwaysunited.org/uploads/1/3/1/4/131406109/4963742.pdfIn PDF document text
    • http://files.eflenglishdaily.com/uploads/1/3/1/6/131636886/f226e.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://cdn.shopify.com/s/files/1/0484/8005/9542/files/menosawixuvelukedasowo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7086/6079/files/divowoxinesosipuxub.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0386/1401/files/the_essays_of_warren_buffett_lessons_for_investors_and_managers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c61d717-24bc-42d4-ab07-7e6f2168e33b/dabazuruboremiboxiboz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6193fc2d-cfd7-45ad-848b-c39aadb4aa78/92770972415.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3840/7832/files/430493335.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6838/1591/files/chicago_daily_law_bulletin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/3927/2345/files/powejipix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5486/6333/files/37288165983.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_off000064e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64E1 5000 bytes
SHA-256: d023248e998ce88fa5896fcab40829493e4ac5d9247e8972660028bca4e36edc
font_01_sfnt_off000075e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75E5 10268 bytes
SHA-256: 1e65acbd9948593fe909cf72827098da6cc57e9dda305dcae954581316ae5ee5
font_02_sfnt_off00009914.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9914 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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