Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba13b0d038a8d656…

MALICIOUS

PDF

72.6 KB Created: 2021-03-02 02:38:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: dfe755c1971aaa3a4274ff13e78e9be1 SHA-1: 15eef3deab4d03d39fa703543e00d2f9b3a801f9 SHA-256: ba13b0d038a8d656993e495ecb2566a267c534eaa9e14561be69bff66cfbf9e9
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://yafferge.ru/wix?keyword=feed+me+5+unblocked In PDF document text
    • http://copyrightshelpscenters.com/lowemiteliwokivefagodori21276.pdfIn PDF document text
    • http://worozoxiw.sportsontheweb.net/wesawaregojupobusomu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481831/normal_5fcdcff7b61eb.pdfIn PDF document text
    • http://zixivudu.getenjoyment.net/42909022902.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368996/normal_6010e2734d957.pdfIn PDF document text
    • https://werobipopopavuv.weebly.com/uploads/1/3/1/1/131163729/9176263.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421205/normal_600d99261c3ab.pdfIn PDF document text
    • https://togajakuro.weebly.com/uploads/1/3/1/4/131409127/4625818.pdfIn PDF document text
    • https://kutawujotin.weebly.com/uploads/1/3/4/0/134016956/4580806.pdfIn PDF document text
    • https://xidumalebuwun.weebly.com/uploads/1/3/4/8/134894794/9220034.pdfIn PDF document text
    • http://bopolubolef.mywebcommunity.org/26184861395.pdfIn PDF document text
    • https://kujepilam.weebly.com/uploads/1/3/5/3/135343620/gitumidoludub.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455198/normal_5fe0db75292f4.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/babuxufarizuxur/nutritional_information_beets_pickled.pdfIn PDF document text
    • https://s3.amazonaws.com/xapijifas/cds_2_2019_paper.pdfIn PDF document text
    • https://s3.amazonaws.com/votawawo/chief_information_officer_salary_us.pdfIn PDF document text
    • https://s3.amazonaws.com/lotibabakuj/avery_template_5395_illustrator.pdfIn PDF document text
    • https://s3.amazonaws.com/takateg/45547082707.pdfIn PDF document text
    • https://s3.amazonaws.com/liwafo/fimodobukomowunodo.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_off0000e320.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE320 4884 bytes
SHA-256: af5c850afc0cc35d9f160f57ecf5c5834d250b884a028e78237491f96e0661ec
font_01_sfnt_off0000f3b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3B1 9892 bytes
SHA-256: cfe01a1c77e1965969b6b753ed0a937cfa118aec645371681db52d2f7b39dec6

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