Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a8c216aec5aeb95…

MALICIOUS

PDF

67.5 KB Created: 2021-01-10 05:47:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-01
MD5: baf08e58a62c39902605a0435b7235a8 SHA-1: dbb0690bd207b9cd14357a3c7a0435afaa3ec2e1 SHA-256: 5a8c216aec5aeb952d6b48c71c68e8180972ed3f37199b774919462e290534bf
244 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://gettraff.ru/shook?utm_term=blasphemous+viridiana+help In PDF document text
    • https://site-1176004.mozfiles.com/files/1176004/flat_pack_dolls_house_uk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484805/normal_5ff849f882393.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497131/normal_5fb97bb8d9861.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488855/normal_5fd9b16e38313.pdfIn PDF document text
    • https://cdn.sqhk.co/gulifunanale/iegebMr/facts_about_spain_food_ks2.pdfIn PDF document text
    • https://cdn.sqhk.co/dipujabuxiw/dZhb2ja/xunikurujuxepewonowuwif.pdfIn PDF document text
    • https://site-1168511.mozfiles.com/files/1168511/hmrc_uk_tax_contact_number.pdfIn PDF document text
    • https://site-1203694.mozfiles.com/files/1203694/24497601892.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389365/normal_5f9cd6d568673.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489054/normal_5ff9acdf487d4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378628/normal_5f98fe2441361.pdfIn PDF document text
    • https://zawasofolebu.weebly.com/uploads/1/3/4/9/134902788/monofaki.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416513/normal_5fecbd720f5b3.pdfIn PDF document text
    • https://site-1173894.mozfiles.com/files/1173894/40222195189.pdfIn PDF document text
    • https://site-1168409.mozfiles.com/files/1168409/16465096511.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000c99f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC99F 5308 bytes
SHA-256: 31a0e59e0adbbd8d2f67c5ae97e7a069dd2b34c31725ce37bd12cfb77492f7e6
font_01_sfnt_off0000db86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB86 11376 bytes
SHA-256: d419d153d14bec49f896af94b9f0016ac93891b37a646960d47179cb55634a80

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