Malicious PDF — malware analysis report

Static analysis result for SHA-256 8332660c66af1e18…

MALICIOUS

PDF

58.3 KB Created: 2020-10-28 06:48:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: c63dbd5ac9268d25de500363be9c5a7d SHA-1: 349b4c610ce53980490024ca61efd4e0b9d894d6 SHA-256: 8332660c66af1e18e3d7f21d50747d46133a383c0a2b171c08752a018ec47d64
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to known malicious redirectors or link farms. The document body, though heavily obfuscated, contains a URL that appears to be a lure for 'knockout flea spray reviews', suggesting a phishing or scam attempt. The ML classifier strongly indicated maliciousness, and the presence of a redirector link further supports this assessment.

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://gettraff.ru/123?keyword=knockout+flea+spray+reviews In PDF document text
    • https://rosuxemu.weebly.com/uploads/1/3/0/7/130776582/juwogul-dubuw-tetabenumekeze-lenamokodego.pdfIn PDF document text
    • https://lotagixowila.weebly.com/uploads/1/3/1/1/131164100/wopebafojupizibes.pdfIn PDF document text
    • https://wefamojugibe.weebly.com/uploads/1/3/1/1/131164519/6875928.pdfIn PDF document text
    • https://digonowokeke.weebly.com/uploads/1/3/1/8/131856318/kuwiv_pepilep_potav.pdfIn PDF document text
    • https://tipefejiri.weebly.com/uploads/1/3/0/9/130969755/9926630.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387244/normal_5f9622459c3e3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365620/normal_5f87398ea5f0f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375197/normal_5f910ae7ea1b2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366018/normal_5f881b5c2ed27.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373755/normal_5f89d50cc1115.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/3fd8cb6c-b62d-461e-b9c9-3e84b38a5039/16464843382.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/05f9df05-3768-4091-be41-f356ed91890c/liwadoxovokedemoriku.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f0f30ae-bc52-4732-ab22-5c862a9b9987/tipaz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb043b1b-480f-4b96-b13d-3a5e0a3f47a4/65066092905.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c08cf5e-7895-449a-9228-3bf7e17bb1b8/lemupedipejurowaxilux.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5e442f5-faca-43e4-b5b7-de6389b96b24/hero4_user_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1c1cf2f-f835-4616-b84c-41447797409e/60693609569.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0147fbba-a6a2-470e-9050-fb509249e7cc/fusunevumaxa.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008882.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8882 5296 bytes
SHA-256: f217a3570e32c683b1cabccb67cf50f645ce89317e1298897aabb247b92acf5d
font_01_sfnt_off00009ab0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9AB0 10860 bytes
SHA-256: 84290a31d9b6a851770ec3b8b782b31fc90013457f1db9e7a5e57bc59eb67072
font_02_sfnt_off0000bfd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBFD1 18076 bytes
SHA-256: 1d4681231f8d123e9d6f5308a90a2c51462ad0f058d51ca43185d7e8f350fdac

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