Malicious PDF — malware analysis report

Static analysis result for SHA-256 5760906e10bfbd54…

MALICIOUS

PDF

96.5 KB Created: 2020-10-26 13:14:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 7534e78d98230f6a17d85dc244d745f1 SHA-1: 55e7b9f48727acb0ce95096a617585296ad06c4a SHA-256: 5760906e10bfbd54ea7c8011c50fe8c21da97bdc106265048e8b3d277716fd0a
194 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure. It also exhibits characteristics of a link farm, with numerous external PDF links. The embedded URL points to a redirector that likely leads to a malicious site, potentially for phishing or malware distribution. No scripts were extracted, but the PDF structure itself is indicative of a malicious redirection attempt.

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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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=risk+reliability+and+safety+innovating+theory+and+practice+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4379034/normal_5f929ab831678.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401732/normal_5f91c48635166.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382643/normal_5f8d3b7d25215.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365602/normal_5f8fe12c7f0cd.pdfIn PDF document text
    • https://keniwuki.weebly.com/uploads/1/3/1/4/131483234/7885719.pdfIn PDF document text
    • https://nulixedupalaz.weebly.com/uploads/1/3/0/7/130739510/zuzedakeg.pdfIn PDF document text
    • https://putigazabikikim.weebly.com/uploads/1/3/2/6/132682718/8571898.pdfIn PDF document text
    • https://sijevunima.weebly.com/uploads/1/3/1/8/131859613/xotuxumivefitumu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2473/5643/files/acuerdo_climatico_de_paris.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/1574/7753/files/51583694169.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/9297/1172/files/4958537070.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/4114/2968/files/figafanoribamasame.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/9041/4241/files/80778017554.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5747/0872/files/fetudazurak.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1061/1607/files/48000099459.pdfIn PDF document text
    • https://s3.amazonaws.com/megulu/fakutubib.pdfIn PDF document text
    • https://s3.amazonaws.com/degisapemifa/home_behavior_chart.pdfIn PDF document text
    • https://s3.amazonaws.com/fadedosi/49983093870.pdfIn PDF document text
    • https://s3.amazonaws.com/farezelof/rokesuwutadon.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_off000138c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x138C7 5792 bytes
SHA-256: d89236b143c2cf85a04827c21cfbec84c8fd7d99309e3b6cf3695798284a0258
font_01_sfnt_off00014c80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14C80 11716 bytes
SHA-256: 99e3b2ec9ce7baee7b0243f6608ff071bb7bb7b5ef351b49cb39df2e58df678b

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