Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2758367f9a54183…

MALICIOUS

PDF

43.4 KB Created: 2020-10-17 11:01:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 19daf4a8c4c0f004055003cfee762730 SHA-1: a67173561697124bd7bc37664a2397f8434afa47 SHA-256: d2758367f9a5418366026576f8eb7f44a81495c52b10a34bd62b0dbe218faf73
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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=kim+kardashian+hollywood+hack+apk+10.0.0 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4367680/normal_5f88a127a6593.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369935/normal_5f88ff87ba66c.pdfIn PDF document text
    • https://sepikupi.weebly.com/uploads/1/3/0/7/130738949/5b9fb40.pdfIn PDF document text
    • https://gazesomudari.weebly.com/uploads/1/3/1/0/131070071/2531f5ae602e.pdfIn PDF document text
    • https://dudikojegak.weebly.com/uploads/1/3/1/4/131406444/jibutunutesinidinite.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376857/normal_5f89c20875542.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366676/normal_5f87713e2bdbf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369911/normal_5f87fa0521b47.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/d289a020-16a0-41c9-b2b8-689aff536b56/xododunenizevoxo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f0edc19-992e-4a60-b065-3c090e49cabf/luzarubitukabujunorijones.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47496a77-a5f0-4509-b9f0-62314283c694/dewiwagixodaw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/52ca0ead-8b52-492b-8277-a81589949430/golafaxipisumotal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cedbd83d-5b70-4827-95cf-38dbab09d80b/16471314008.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc52aa9f-35df-4c1a-9a2f-5df400a8f181/dofabarulomibigipo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/0863/3243/files/vocabulary_builder_book_in_hindi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/4324/4200/files/20475649610.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_off000068fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68FA 5764 bytes
SHA-256: 60a83a633f2f0f332f27729dc27a701c4d9316dbb70ad6af3e8d29cae927aae8
font_01_sfnt_off00007c90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C90 10560 bytes
SHA-256: ba3d8bdae4d873ca5a8f094cc62901e4298cb290ef9e35055a4ccd653d7a1b0f

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