Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab3e0fd8301affc3…

MALICIOUS

PDF

69.6 KB Created: 2021-02-26 09:57:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: e6fa7ebbf20b5c74cca8f0cef63df867 SHA-1: 8b55e28d219bf8245697520cb26e520b4aec8559 SHA-256: ab3e0fd8301affc3d8b1637bf48a5e16c2b708661c5f63c293fecfc049a4c23a
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/award?keyword=how+to+make+money+as+a+programmer+in+college In PDF document text
    • https://cdn.sqhk.co/zogameva/giScv0Q/magic_the_gathering_vs_warhammer_40k.pdfIn PDF document text
    • https://xeneniwavufew.weebly.com/uploads/1/3/2/8/132814439/10ad88.pdfIn PDF document text
    • https://cdn.sqhk.co/budatumibowu/s8Ygjic/gubisutolelitira.pdfIn PDF document text
    • http://vofufime.mypressonline.com/25917030113.pdfIn PDF document text
    • http://tejovotemikodes.getenjoyment.net/puxagetus.pdfIn PDF document text
    • http://gagimubu.mywebcommunity.org/nepal_constitution_day_2019.pdfIn PDF document text
    • http://gakagebir.mypressonline.com/veterinary_assistant_certificate_programs_near_me.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373520/normal_5feb0b1667173.pdfIn PDF document text
    • http://galosidijixiwu.mypressonline.com/kenmore_ultra_wash_quiet_guard.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426815/normal_5fdb8a880302e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500665/normal_60373c7654c63.pdfIn PDF document text
    • https://tenanetudoji.weebly.com/uploads/1/3/4/2/134266315/nofesawilobuwupus.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/suzujewa/juzaputudorudaju.pdfIn PDF document text
    • https://s3.amazonaws.com/wiwuxot/20066927299.pdfIn PDF document text
    • https://s3.amazonaws.com/limepusotanal/innocent_witness_subtitle.pdfIn PDF document text
    • https://s3.amazonaws.com/rotowan/battlefield_3_ps3_hacks.pdfIn PDF document text
    • https://s3.amazonaws.com/vudivuzakal/interpreting_linear_equation_graphs_worksheet.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_off0000d3d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3D6 5472 bytes
SHA-256: 69d8965c91aa61e9c5c54081f9137b092ffa807d83171cb0f3c3da46da459dbf
font_01_sfnt_off0000e678.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE678 10160 bytes
SHA-256: 1f28082ab7e1d1fa01f2dc50041c836172bea7743e6eebbfb406e48c1414e9ae

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