Malicious PDF — malware analysis report

Static analysis result for SHA-256 22c80b4eec2c7919…

MALICIOUS

PDF

44.4 KB Created: 2020-10-26 00:57:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 797fe54cb28ce311b8b92f436b013b95 SHA-1: 83227e9273da0a65beb5ca68a48bcfc65d8dfcf4 SHA-256: 22c80b4eec2c791901517f2b04becbf28093145bf6788990adadf3b1676c70d3
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to benign content, but one critical link directs to known malicious infrastructure. The ML classifier strongly flagged this PDF as malicious, and the presence of a link farm suggests an attempt to manipulate search engine results or redirect traffic. The document body, though heavily obfuscated, contains the primary malicious URL.

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://cctraff.ru/aws?keyword=electromagnetic+waves+class+12+project+pdf In PDF document text
    • https://sirawomaperuli.weebly.com/uploads/1/3/1/3/131398091/kemilarox_meruwabi_jexofakuk.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/1/0498/6273/8075/files/54255135931.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9155/8551/files/13997311333.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/4961/9103/files/thunder_lyrics_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd046fb9-132d-494a-8669-cb5651044822/ejercicios_de_diagramas_de_flujo_resueltos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2494570d-7874-405f-af83-6da91d62a8a9/6690680135.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/07a645e8-7347-4a70-a490-e4f958c55e96/memezefizoxutenasenugituz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cca15ee6-b379-4761-b436-b96cbbdb399c/34883734891.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/754e93e4-2edd-48a3-ae1c-07b8dc55a8be/pejitukavivuzoxujinuf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce15d789-dc66-4a08-a672-7856151d0a57/fipokadefano.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d9959db-9c47-497d-976a-ad7c4a140516/falezifeler.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c57dc034-eabd-42e5-9a20-fbf21f8b054a/jesanobiromuzotoruganox.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/8286/1729/files/sepirirar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4366/7616/files/zokesijuxesegorogafap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3121/5774/files/govisaxofegiwevewex.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1347cdd9-d545-4e08-b91a-967270bf1c62/60358800506.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/63b7c0e2-5bb3-48cc-90bb-6adfbc28c833/ant_movie_catalog.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/00bb8666-49bc-4f08-8016-91132f2a498d/anexo_leiruk_el_chacal_disco_complet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f96ec20b-0047-417e-aeaf-fd6d19dced17/43575117958.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_off00006b61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B61 5844 bytes
SHA-256: f4c92d3848b46d2eba12c2252883b9a7e59a0a136576efdfc2a541b511165950
font_01_sfnt_off00007f4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F4C 10772 bytes
SHA-256: d6232e51f7b933cceac4371f670fb85d640bc1fdfc5b43bcb6b92c34c6016b3d

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