Malicious PDF — malware analysis report

Static analysis result for SHA-256 50483b9624158872…

MALICIOUS

PDF

63.7 KB Created: 2021-02-15 00:59:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: ee7dceb7d1e43f0fffac9d468ae2b189 SHA-1: b4bd3b0f31274afb4d50fa65383ee281d043ec8c SHA-256: 50483b96241588721bb3d22d500d4cadb58df5d22d379f833f77ad4720639ede
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/123?utm_term=rottweiler+puppies+for+sale+in+palm+beach+county In PDF document text
    • https://cdn.sqhk.co/dapumexader/jeugjWt/20787610033.pdfIn PDF document text
    • https://cdn.sqhk.co/kixobaza/gchjEib/word_cross_reference_table_number_only.pdfIn PDF document text
    • https://xilamexazoleguj.weebly.com/uploads/1/3/2/6/132695560/baseb.pdfIn PDF document text
    • https://tugofemupufere.weebly.com/uploads/1/3/4/5/134584107/bebawi.pdfIn PDF document text
    • https://cdn.sqhk.co/wisisatofife/CghXiOk/identity_v_wiki_wu_chang.pdfIn PDF document text
    • https://cdn.sqhk.co/mitukutowum/d2ewifm/rukekijagelafagodiv.pdfIn PDF document text
    • https://lurexiji.weebly.com/uploads/1/3/4/5/134594132/5117976.pdfIn PDF document text
    • http://nabuvegawemuk.22web.org/51532930855.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464313/normal_60161c67c2414.pdfIn PDF document text
    • https://tesazosutev.weebly.com/uploads/1/3/4/7/134714215/3473953.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/setigafat/15432728806.pdfIn PDF document text
    • https://s3.amazonaws.com/gagagakigibapo/shopify_change_blog_template.pdfIn PDF document text
    • https://s3.amazonaws.com/nawuvud/devexpress_login_template.pdfIn PDF document text
    • https://s3.amazonaws.com/roware/11232715111.pdfIn PDF document text
    • http://romudiforexove.epizy.com/wotonejaz.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_off0000bd9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD9F 5596 bytes
SHA-256: 86e7ab142a166772ad8f9064d0ac6261904c4e692aedba7a11c803da6c18ae55
font_01_sfnt_off0000d093.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD093 9748 bytes
SHA-256: 79f672db768dad6d3c5ffdc12474643c72f4eb90ff55e1271d73f95c90fa0180

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