Malicious PDF — malware analysis report

Static analysis result for SHA-256 476b60935d5f74f5…

MALICIOUS

PDF

45.9 KB Created: 2020-11-09 10:49:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 04de1226dc9f9842365bc249cc336f7d SHA-1: b9f221075d85879f14dff412fc247350c47f1e73 SHA-256: 476b60935d5f74f567f52e5a0459dfeecd1183525d212fd1171348f359bd9fee
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a high number of embedded links, with one identified as a malicious redirector. The ML classifier also flagged this PDF as malicious. The presence of a link farm and a redirector suggests an attempt to direct users to potentially harmful content, likely as part of a phishing or scam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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://traffmen.ru/123?keyword=strike+force+heroes+4+armor+games In PDF document text
    • https://cdn-cms.f-static.net/uploads/4368235/normal_5f9123bd8a196.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374533/normal_5f94964adc9c3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392444/normal_5f9121a9d4219.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366014/normal_5fa841f29b96b.pdfIn PDF document text
    • https://moxitasa.weebly.com/uploads/1/3/1/4/131454719/kiremupis.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/50088714-2543-48f1-992f-9edd521a6dd2/zuxadidinopafen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee65880b-028b-442c-b745-7288e7258f0a/84996293889.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1c85422-5a95-4bbe-9eea-e993fb01fc84/hypervibe_vibrating_platform_exercise_machine.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c22be267-53b1-4e50-aec5-972eca9ab387/47111423913.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c96f6dca-629b-4de0-9598-30f30668f6c8/65288302658.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f03a2c3e-f4c7-44cf-abd9-c96d1e94407f/mastering_python_networking_2nd_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea199e52-dc21-40b5-8fcf-5672ff7398bd/animal_farm_literature_guide_answer_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a10ac161-118c-4510-8455-a15c2bea6ee7/88987491874.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

Related samples 2

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000071f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71F2 5520 bytes
SHA-256: 62eaf00a16c892282f9cb9d3d0f7f05178c628abc0fcbf288cbf7bdb3ca89290
font_01_sfnt_off00008498.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8498 11388 bytes
SHA-256: c047639d07b220b0231b1c4b6ddb9b935b84031c117734d0e3466fa163b34f18

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