Malicious PDF — malware analysis report

Static analysis result for SHA-256 38febd7946a95b63…

MALICIOUS

PDF

62.1 KB Created: 2020-10-27 08:28:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-28
MD5: 1ca2adad78fb7fc32190e77169a5c8ad SHA-1: 1200f032114fed4dba2ecaf471aaaa6f2a2f0a8c SHA-256: 38febd7946a95b63215c0ceb35893e3894ef7746fca88635ba7b6a8f7822b0ad
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, with at least one pointing to known malicious redirector infrastructure. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains URLs that are consistent with the heuristic findings of a link farm.

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/strik?keyword=terraria+devourer+of+gods+guide In PDF document text
    • https://kuzaloxamuw.weebly.com/uploads/1/3/1/4/131406684/pugomadogevisiwenar.pdfIn PDF document text
    • https://natizupasa.weebly.com/uploads/1/3/1/4/131437725/saloviganepepi.pdfIn PDF document text
    • https://mijisurux.weebly.com/uploads/1/3/1/0/131070147/kasaduva.pdfIn PDF document text
    • https://wefamojugibe.weebly.com/uploads/1/3/1/1/131164519/8514484.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372702/normal_5f8ac4a7bb5b7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366965/normal_5f8e4dd21800c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418587/normal_5f972b829c450.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374207/normal_5f9538054d929.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371240/normal_5f88e21457a40.pdfIn PDF document text
    • https://jawasolasazilem.weebly.com/uploads/1/3/1/3/131379174/gevoderovepiru.pdfIn PDF document text
    • https://pepotoxuxomupav.weebly.com/uploads/1/3/1/4/131483830/7873197.pdfIn PDF document text
    • https://mutazodot.weebly.com/uploads/1/3/0/8/130874237/fd13efb1dcb.pdfIn PDF document text
    • https://dufevirefat.weebly.com/uploads/1/3/1/4/131438490/jazojevafapigunatun.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/1/0437/2037/6474/files/98313121185.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/1875/0616/files/desarrollo_de_productos_turisticos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/6109/9682/files/free_triangular_trade_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/5920/3234/files/4877856097.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8543/8883/files/duwonuruwat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e72918a2-7960-4d11-b2da-d41593d1129b/sulomogemowatenime.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d0ed259-b0cb-454e-89e4-162130f4031d/podiwiwabepaxajominekuz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/3879/1582/files/english_exercises_for_grade_4.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7597/4821/files/4687675245.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0489/3016/0824/files/facebook_pop_notification_sound_android_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/3340/6871/files/bowl_of_cereal_clipart.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6444/9431/files/the_great_gatsby_chapter_7_annotations.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_off0000b437.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB437 5052 bytes
SHA-256: 051a5829341ca7aa56ae1e68ad8a4470f18d62053100910f21ef460429e264fa
font_01_sfnt_off0000c580.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC580 11060 bytes
SHA-256: 5192a6e00f6ef12609a9210a9764badbb5f2f503cb0d5a85656a394a4aad73c0

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