Malicious PDF — malware analysis report

Static analysis result for SHA-256 69c931fc8b642b39…

MALICIOUS

PDF

59.6 KB Created: 2020-10-29 04:21:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: c1ae3cddea1d3da7919446d89c2a71ee SHA-1: 2525eb5308384a1f04ddae130e76a6d0e06ad468 SHA-256: 69c931fc8b642b3960af7300fc1b04c8653645cdd9baac568c5b1c304ec01f95
154 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links, with one identified as a malicious redirector. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass of external PDF links, suggesting an attempt to manipulate search results or distribute further malicious content. While no scripts were extracted, the presence of numerous links and the ML classification strongly suggest malicious intent, likely related to phishing or SEO spam.

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.com/pify?keyword=assimilation+and+accommodation In PDF document text
    • https://mipirizu.weebly.com/uploads/1/3/2/6/132682564/e085d89a2.pdfIn PDF document text
    • https://juxupadozimufa.weebly.com/uploads/1/3/4/3/134388451/sujinikuw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379610/normal_5f8bcf10c232b.pdfIn PDF document text
    • https://bogadisosupotaj.weebly.com/uploads/1/3/0/7/130776541/213855.pdfIn PDF document text
    • https://wekubuzebebam.weebly.com/uploads/1/3/0/7/130739705/f57993.pdfIn PDF document text
    • https://wesujugureju.weebly.com/uploads/1/3/0/8/130874517/musenene_xaberel_morupobi_tumegefif.pdfIn PDF document text
    • https://dawozonejuveru.weebly.com/uploads/1/3/4/4/134489779/73aa1c8e554503.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382966/normal_5f985cc1168dc.pdfIn PDF document text
    • https://nikuwexipamojag.weebly.com/uploads/1/3/0/8/130813731/70a00bab3f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402250/normal_5f91498f7da3c.pdfIn PDF document text
    • https://fopimakalegej.weebly.com/uploads/1/3/0/7/130738542/ceae648fad6124.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/memul/kexelegoxukowa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1ea8ec7-0780-4d2f-8e78-45374ad08813/nufowekizudebiju.pdfIn PDF document text
    • https://s3.amazonaws.com/vezumobigodub/2004_ford_f250_diesel_owners_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/kezemiradigu/bozunovemal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5e21fed-a7a7-45ce-ba75-1bacdc69a74f/80967962980.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50c05a5f-dba0-4403-8726-730bb2b82c09/ielts_writing_task_2_topics_with_ans.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/05fb32ae-660b-4dac-99a5-13a7124e64bd/bn59_0104a_samsung_remote_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/zuwimadaneb/69194233605.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/apartment_rental_lease.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/agricultural_economics_an_indian_perspective.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009e73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9E73 4648 bytes
SHA-256: b7bf751e1613baa6cf422d694c8c0153c719e302b4b04217a837e8ca6017ae96
font_01_sfnt_off0000ae0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE0D 10776 bytes
SHA-256: d2db1ff8d5c4e8e845fb5abb97103249a06ca2e6c88b89d18b7f0915484c9989
font_02_sfnt_off0000d2c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2C3 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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