Malicious PDF — malware analysis report

Static analysis result for SHA-256 75787922350cb30f…

MALICIOUS

PDF

77.5 KB Created: 2020-11-01 20:44:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 48ae70e1bcc5425ab3f8a474bd0613e9 SHA-1: f55d405e952259d33dd93c65548312c73164e9cf SHA-256: 75787922350cb30fa5f16c9aaa776821ffe2e63e252064662a2367fad4c20ce2
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains embedded links that redirect to malicious infrastructure, specifically identified by the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic. The document body, though heavily obfuscated, contains a URL that matches the suspicious redirector. This suggests the document's primary purpose is to drive traffic to malicious sites, likely for phishing or further malware delivery.

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://cctraff.ru/aws?keyword=dad+n+me+unblocked+games+66 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4368500/normal_5f8b6aa14e0e9.pdfIn PDF document text
    • https://vatipasa.weebly.com/uploads/1/3/0/7/130775610/modisejagajum.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404528/normal_5f95cb2184bed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379474/normal_5f8db16eba610.pdfIn PDF document text
    • https://tavumake.weebly.com/uploads/1/3/2/7/132740551/rikugupolugikopoj.pdfIn PDF document text
    • https://woralolur.weebly.com/uploads/1/3/4/3/134359953/3121638.pdfIn PDF document text
    • https://dojudiwoju.weebly.com/uploads/1/3/1/4/131406456/163574.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382617/normal_5f945cebafd64.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/3bd4cebc-af96-4dc6-9ee1-7c361030517f/suzoviluzuzimame.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0007/0307/files/epson_stylus_pro_3880_ink_refill.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6109/1221/files/94454900024.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23e39d74-5567-4bda-b27e-04530cf643a3/59857174497.pdfIn PDF document text
    • https://s3.amazonaws.com/mizeteb/evoshield_wrist_guard_amazon.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/une_bonne_hygine_de_vie.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off0000f49b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xF49B 28984 bytes
SHA-256: 2fc7cd9cd104ce0fe82fd4e5357f944ebf18efc71e0f9dd46605877c65c71111
font_00_sfnt_off0000be4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE4C 5520 bytes
SHA-256: 9f4eb28771d83c8f8c07d0c4fe9f51303f266e2402ec00ba38235cb9f3d3ec7c
font_01_sfnt_off0000d10a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD10A 10376 bytes
SHA-256: 48e63e56ee18e0c7e75b653d7f824438315e42172e779b0cc567eb9b53a0a24f

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