Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5d61bf5ee3406ce…

MALICIOUS

PDF

77.0 KB Created: 2020-11-13 06:35:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 2614a3447295e040c87db5d37a75444e SHA-1: 2fbad56c73143e879a533709ba20566a56822090 SHA-256: d5d61bf5ee3406cef7858b054921b95e6f8e5bb06aaeb8ea46e48fef7c71487c
254 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://cctraff.ru/aws?utm_term=sarkar+full+movie+free++in+tamilrockers In PDF document text
    • https://cdn-cms.f-static.net/uploads/4369179/normal_5f8e5e1d3dc10.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365545/normal_5f90537d6b15d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413013/normal_5f99327b51959.pdfIn PDF document text
    • https://kidunaxu.weebly.com/uploads/1/3/1/4/131437100/birupigorunivu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368229/normal_5f8ed09f49990.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369786/normal_5f889aa4b14f0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387218/normal_5f91637eb4dee.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369901/normal_5fa091096d613.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/wunupalezozerud/48616981299.pdfIn PDF document text
    • https://s3.amazonaws.com/vawoginele/55098989792.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/971d0632-7306-4da4-bfa5-3d7816cee81b/vuzofo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/187edecd-667c-45f3-ab19-669746ff254b/94918918715.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cc00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC00 5252 bytes
SHA-256: 37bf378f91a74fbf6234c1265b137d07d05eecb71b6cb69dfe367358c7bad674
font_01_sfnt_off0000ddce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDCE 2336 bytes
SHA-256: ce83e8ea4ae5f081c7e0a0719b051270df89ea936899ee8772e425567b301b82
font_02_sfnt_off0000e860.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE860 11544 bytes
SHA-256: abc50cc2b6a2ae27ead297e91914295f1d33dc20b704bfe124e19567edd3b54e
font_03_sfnt_off00011024.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11024 16556 bytes
SHA-256: 3c0022a493e630f68a6f085a8f1fa36ea88a8c426105bf77278f7dd21f709756

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