Malicious PDF — malware analysis report

Static analysis result for SHA-256 37ea74dd021c6ab4…

MALICIOUS

PDF

47.5 KB Created: 2020-10-29 06:42:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: 935800e0660b626173f13070ee5d372c SHA-1: 8fb38c613a0542620c4b945428c33f5279189c2b SHA-256: 37ea74dd021c6ab40461de5dd79a31ff9904dd283678560878a3df9f8307d801
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://ttraff.me/123?keyword=vampire+academy+book+2+pdf+google+drive In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366308/normal_5f929032e5e0f.pdfIn PDF document text
    • https://fufivivol.weebly.com/uploads/1/3/0/8/130873849/8142125.pdfIn PDF document text
    • https://wenadexedodoren.weebly.com/uploads/1/3/4/3/134322255/4556885.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381347/normal_5f8d373977235.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380705/normal_5f98a17d4214b.pdfIn PDF document text
    • https://kokexofagisukop.weebly.com/uploads/1/3/2/7/132710589/3509862.pdfIn PDF document text
    • https://sisaseno.weebly.com/uploads/1/3/0/7/130776680/c398e5d839673.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367273/normal_5f8e10404b458.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418984/normal_5f95b9bf235e2.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/1/0428/5349/9046/files/10455362132.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/41de0d76-4422-4155-87d8-5c1026cd0980/xenixinovivagilumami.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/7208/5926/files/neuronale_netze_buch.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/325b9c1a-9667-4a8b-b5ff-36b9d489604d/94884455404.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/8670/1238/files/wurufeduzelu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b9f89c55-ca2c-410c-918b-82febde09c6f/sepupilowagopabugafosakud.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae23446b-95ae-4d29-a13b-2ad9e526bbd1/doxazedu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5e8e834-8d57-4b6e-9c55-20815ff40e68/rodrigue_et_chimene.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f31f7451-f861-4438-be43-e148172ed869/7134687379.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b9e15ff4-efc6-4f7b-8501-9c29a52cc445/descargar_cicatrices_pelicula_comple.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ce52d99-8793-42b5-97d1-6675f3b6679b/2601472345.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/009ff67a-580f-4584-80d2-cee69e369bdb/nifafusevobif.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/29d2efef-36f0-4902-9eb9-a6b4ce2e93ef/mizawevizakogoxime.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_off00007829.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7829 5760 bytes
SHA-256: e94fb1147fd6e6d29715cd0ea6113c443baba5be6f4e01bf1e28ac21c6608e50
font_01_sfnt_off00008bca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BCA 10712 bytes
SHA-256: 7d21e52831efe26e104591162dd07967c4086c15d1a7b90cb0f3c6d55ed77482

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