Malicious PDF — malware analysis report

Static analysis result for SHA-256 51a9191c3149ab2e…

MALICIOUS

PDF

39.0 KB Created: 2020-10-29 05:12:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 0a089336f41d2eff62f88da3d57eee62 SHA-1: 6a71e8bc2a733e173a90e9cd3487badfbe822df0 SHA-256: 51a9191c3149ab2e19781b904aef28db230913c06dd553d3b83480b43130a439
184 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/aws?keyword=focus+daniel+goleman+pdf+espa%25C3%25B1ol In PDF document text
    • https://cdn-cms.f-static.net/uploads/4375352/normal_5f8f9bb87827c.pdfIn PDF document text
    • https://kuzaloxamuw.weebly.com/uploads/1/3/1/4/131406684/4994816.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379731/normal_5f8abfbccd964.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370778/normal_5f8bdbb4b80a7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410186/normal_5f988e5f715d8.pdfIn PDF document text
    • https://xojerajap.weebly.com/uploads/1/3/1/3/131384359/foburadip.pdfIn PDF document text
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/ditufesuzosas_vodidos_pupikisipojovib_rixat.pdfIn PDF document text
    • https://senobatupubem.weebly.com/uploads/1/3/1/4/131437889/9880944.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/1/0484/9690/2294/files/brahma_chicken_for_sale_in_kenya.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3973/6487/files/monkey_quest_rewritten_release_date.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/cinderella_fractured_fairy_tale.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7fcb160f-2dcd-4a33-a51b-00eaf9eb8b0d/10193291997.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3175/5932/files/aplikasi_edit_subtitle_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/63722e15-5cf7-45ad-be5c-d0ec0398a35d/kiweja.pdfIn PDF document text
    • https://s3.amazonaws.com/lanorolowu/sorawijaruwefir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7148/8668/files/trade_what_you_see.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/38a8ddea-8443-46d8-9e95-386fa7aef6a9/94673540680.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab166cdc-979c-409f-b533-c9ffcb371a14/6801333297.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/205504cc-2f69-41c4-9ea6-07e894e9d1ef/ronald_reagan_soldiers_pledge_speech_transcript.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1d141ab-95fb-4430-8a69-d02d6314b33d/bransden_joachain_physics_of_atoms_and_molecules.pdfIn PDF document text
    • https://s3.amazonaws.com/vatakefojunib/lutaj.pdfIn PDF document text
    • https://s3.amazonaws.com/juvuraguvutoxif/joposog.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/35125595639.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_off000056c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x56C9 5548 bytes
SHA-256: 0deb5b018f529ed529615c5bd2d477f8cbfa0817f5362df941070c0f11eb7685
font_01_sfnt_off00006961.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6961 10192 bytes
SHA-256: bf0d7871dc12897cba7956f7c16204c3ba071d8ec31c8f4c0e63ec5e9cbf4ab2