Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b33a979784bde6e…

MALICIOUS

PDF

57.4 KB Created: 2020-11-01 10:46:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 8af25450cad88db9541ff063cd0ce712 SHA-1: 3bd06245fb6b04dd76d3defc59b8e1b9093aeed8 SHA-256: 6b33a979784bde6ed720e13669f5249136d970352fed499727ddeff1e6ab6ca6
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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/aws?keyword=tap+titans+2+mod+apk+3.11 In PDF document text
    • https://saxexowiki.weebly.com/uploads/1/3/0/9/130969873/3449483.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369317/normal_5f882b4137ea7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366958/normal_5f89e4db2ec5c.pdfIn PDF document text
    • https://xogofodaromaf.weebly.com/uploads/1/3/4/3/134387758/ebf73.pdfIn PDF document text
    • https://fodezamu.weebly.com/uploads/1/3/1/4/131407453/wijigomofiweb_lotitosede_jukis_dirum.pdfIn PDF document text
    • https://pafuwaron.weebly.com/uploads/1/3/4/3/134385690/dugupugekunaritikot.pdfIn PDF document text
    • https://jirixakevafu.weebly.com/uploads/1/3/4/4/134404576/vepemad-pesowaf-tagatufaxuz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391624/normal_5f925226b643a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365601/normal_5f87f5868f9a8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383304/normal_5f8e36c6e5cea.pdfIn PDF document text
    • https://piziruzebizopu.weebly.com/uploads/1/3/4/3/134350425/988ea280b27d.pdfIn PDF document text
    • https://zepixufiguw.weebly.com/uploads/1/3/4/1/134108583/7282306.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • https://s3.amazonaws.com/dazemi/2360137159.pdfIn PDF document text
    • https://s3.amazonaws.com/bevekizadoxuj/night_shift.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7fd65b20-d512-473f-aea1-9f979f53a23d/ashland_middle_school_ashland_ms.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://www.gnu.org/licenses/gpl.htmlIn 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_off00007a53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A53 5372 bytes
SHA-256: 0fb37bbe7d3b837dd3a15a3167eb28586af30fd645780097df70d5f2e34f467c
font_01_sfnt_off00008c8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C8D 5812 bytes
SHA-256: 6b5100443bb807e245a5fd72c4795b23540e64b31cb8366d2e77dab3059e5134
font_02_sfnt_off00009b28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9B28 11720 bytes
SHA-256: 23cced554a91ed4b71d45752992eeed8f89d3ef49855fc368b5783f44ae721e9
font_03_sfnt_off0000c35b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC35B 16068 bytes
SHA-256: 912e8c3c37b183d760f7f382ef110bdca05c7793b62d2efdd5772423ec248018

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