Malicious PDF — malware analysis report

Static analysis result for SHA-256 05fc6d0d12d13018…

MALICIOUS

PDF

42.2 KB Created: 2020-11-02 22:03:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: c0e82fc6010d113dc4028091e07a4344 SHA-1: 5398b770ae79b705739db38217da2fea3a3b8401 SHA-256: 05fc6d0d12d13018ae95f94f8729c017cacfe2eaddf33d70c30b91845aa3970d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by multiple critical heuristics for containing malicious redirector links and a link farm. It embeds numerous URLs, with at least two pointing to suspicious domains. The ML classifier also strongly indicated maliciousness. The primary attack pattern involves luring users to external, potentially harmful, websites.

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://ttraff.me/123?keyword=in+the+womb+national+geographic+youtube In PDF document text
    • https://foduzivanikatik.weebly.com/uploads/1/3/4/4/134492938/vibufip.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404308/normal_5f9b9ee5a688a.pdfIn PDF document text
    • https://saxexowiki.weebly.com/uploads/1/3/0/9/130969873/rumojako.pdfIn PDF document text
    • https://xogofodaromaf.weebly.com/uploads/1/3/4/3/134387758/xokerodezuwi.pdfIn PDF document text
    • https://jikeberu.weebly.com/uploads/1/3/1/8/131857846/0e52705b.pdfIn PDF document text
    • https://mixorone.weebly.com/uploads/1/3/1/4/131438240/4053217.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/leguvefu/2120554682.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0eb6a0e0-0fb0-4659-a453-29b93e8f4b74/7520506747.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec235a0d-4e7c-4194-b316-c5b2edd9a7f5/vafapivija.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6761/3077/files/30338085382.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/3861/1355/files/54293807571.pdfIn PDF document text
    • https://s3.amazonaws.com/pexodugosa/tegodosiniwapulisarubabed.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/4045/1991/files/govewolenezuwumi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1436/4059/files/registrare_telefonate_su_android_9.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_off00006465.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6465 5440 bytes
SHA-256: a849da8332cb040c3feef564fdee6f20d8aa55e97437fd79be5ae793bb3269c8
font_01_sfnt_off000076d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76D0 10988 bytes
SHA-256: 7a50f9165476bb5df1a56c9f0a908a4559d0519fa0f09212cee5897876022114

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