Malicious PDF — malware analysis report

Static analysis result for SHA-256 9591a04dce03c66e…

MALICIOUS

PDF

72.9 KB Created: 2021-02-12 12:49:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: e474fcecb4d5f01707cbd444b079c70c SHA-1: 8f1b4516d24b974339045d0bea32dbefe0fe25d8 SHA-256: 9591a04dce03c66ef3d4e6505fdf627e4ce62d344a64aeaf6e13f7bd9667309d
254 Risk Score

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
  • 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://crophysi.ru/wix?keyword=pitbull+puppies+for+sale+in+syracuse+ny In PDF document text
    • https://cdn-cms.f-static.net/uploads/4476140/normal_601d8ca5a8bd8.pdfIn PDF document text
    • https://zuwukozoxuwiged.weebly.com/uploads/1/3/4/7/134713444/jowoxefoj.pdfIn PDF document text
    • http://copriyghtconfirmed.com/vutizfl36z.pdfIn PDF document text
    • https://kopusinuzek.weebly.com/uploads/1/3/4/1/134131929/4a96c4f.pdfIn PDF document text
    • http://copyrighthelpptteam.com/coca_cola_hbc_annual_report_201730jf7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375515/normal_5fd904e32485e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417024/normal_5ff5ea69644b3.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/zuguvoxoki/pumogikegatatanoliro.pdfIn PDF document text
    • https://s3.amazonaws.com/satuja/rezulabukat.pdfIn PDF document text
    • https://s3.amazonaws.com/zubuwujoxom/56733069865.pdfIn PDF document text
    • https://s3.amazonaws.com/luworizesupox/alvida_jumma_mubarak_images.pdfIn PDF document text
    • https://s3.amazonaws.com/gapuruxumeg/dryer_sheets_and_cats.pdfIn PDF document text
    • https://s3.amazonaws.com/lolaritemukole/22312181815.pdfIn PDF document text
    • https://s3.amazonaws.com/rozebofukixus/tumix.pdfIn PDF document text
    • https://s3.amazonaws.com/dixaleko/remove_password_protection_google_spreadsheet.pdfIn PDF document text
    • https://s3.amazonaws.com/zopenave/beacon_health_options_claim_form_address.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_off0000df91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF91 5252 bytes
SHA-256: 7f92aef0eeecb608825a281b3f6bd8d6af61acfbe79f373da1a1f925302bb596
font_01_sfnt_off0000f184.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF184 11000 bytes
SHA-256: 073275b5bed8648eede646ff5d211c0f192883ec06583ac131bdb2dac51f713e

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