Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8a94e4fdb3421a9…

MALICIOUS

PDF

45.0 KB Created: 2020-10-16 13:30:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 0b216afcb7ec06405ce8a4ae9723913d SHA-1: f863f11fa2267f5f55ec5667bb65955d282ad756 SHA-256: e8a94e4fdb3421a9c89a9cdb753ef00e1481e4c902f90d2b846058b79371757f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with the primary one leading to a known malicious redirector. The document body, though partially corrupted, includes a URL that appears to be a lure for clickbait content, suggesting a phishing or SEO spam campaign. The ML classifier strongly indicated maliciousness, and the presence of a link farm further supports a malicious intent to drive traffic to potentially harmful sites.

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://ggtraff.ru/123?keyword=did+meghan+markle+star+in+dater%2527s+handbook In PDF document text
    • https://gogebuzavoriro.weebly.com/uploads/1/3/2/6/132681212/890c03.pdfIn PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/kinufijozulof.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/zanazanekoxel.pdfIn PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/velowo_dakemolaku.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368732/normal_5f87b9bfaed60.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367000/normal_5f873c6b55350.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366043/normal_5f875bb244514.pdfIn PDF document text
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/fada5ae.pdfIn PDF document text
    • https://xawuwotogot.weebly.com/uploads/1/3/2/6/132695388/5434015.pdfIn PDF document text
    • https://nikoxutaju.weebly.com/uploads/1/3/1/3/131378952/gulizufag.pdfIn PDF document text
    • https://wedebiki.weebly.com/uploads/1/3/0/9/130969436/dcefeca.pdfIn PDF document text
    • https://sakukavazu.weebly.com/uploads/1/3/1/3/131379729/vowesiw_sunifanosepuso_bokituve.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/1/0486/1804/5600/files/hempy_bucket_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/0370/6006/files/three_body_problem_movie.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0460/0905/7441/files/29102922348.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8081/8581/files/decolonization_of_africa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a4f3a81-a29b-44c3-9d93-5b52d48e3858/gepopebodiwozazokigog.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d6cbab1-2132-44fc-ada2-91792115f3a9/95166414904.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ee07cb0-c5e5-48cb-aeb2-4ab7fbb54f13/63421436663.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/26480bb7-4c67-4bb3-8bbb-5e5a6d62a867/42657629058.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e4665de9-5475-419a-9252-2ccab83e2451/29754645168.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/84ac25e4-242e-477e-9b40-5733a72035e1/tamesimapazopigafiwul.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/35eb284b-1e9c-4c2b-8fd0-b7056885127f/vanonogejux.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_off00006f9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F9E 5476 bytes
SHA-256: c4eca0422e16cbae6b977b51928bf115d704ace6ce49bf4cc0f0beec0c985bbd
font_01_sfnt_off00008213.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8213 10580 bytes
SHA-256: bf71e013e620e0329b1a8c293c0753ac9a9666d0d15a3d7d71ecf6c837c3d37e

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