Malicious PDF — malware analysis report

Static analysis result for SHA-256 86ff8c5f0534c9b9…

MALICIOUS

PDF

53.5 KB Created: 2020-10-25 12:37:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-25
MD5: 483bffdd012e4ca78bcb2eb75e7d55f0 SHA-1: cfb201fb5e3ffc0a53f4d0e8d47dfbfec95721a0 SHA-256: 86ff8c5f0534c9b9b7ec0b04664d1f3688ba997c3cf6af761f4bac2917e5974c
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=bncc+2018+pdf+baixar In PDF document text
    • https://jopulovi.weebly.com/uploads/1/3/4/2/134265775/69fb08bbe761a.pdfIn PDF document text
    • https://juragubiv.weebly.com/uploads/1/3/0/8/130874328/dosex.pdfIn PDF document text
    • https://fuparududewon.weebly.com/uploads/1/3/1/8/131856041/paralavosezoxekularu.pdfIn PDF document text
    • https://bibeliki.weebly.com/uploads/1/3/0/7/130738572/sovonasob.pdfIn PDF document text
    • https://jamuseramomuf.weebly.com/uploads/1/3/1/8/131871426/8819529.pdfIn PDF document text
    • https://tekegalesi.weebly.com/uploads/1/3/0/7/130740489/fegolujusimo_xesudilofux_zanajoxive_zulavediviw.pdfIn PDF document text
    • https://sisodiwitamusoz.weebly.com/uploads/1/3/2/6/132681746/e54ee.pdfIn PDF document text
    • https://famonusowofem.weebly.com/uploads/1/3/4/3/134349488/kagugar_zodowuromoma_nirat_pekemimitid.pdfIn PDF document text
    • https://bogadisosupotaj.weebly.com/uploads/1/3/0/7/130776541/521236.pdfIn PDF document text
    • https://muvisodujop.weebly.com/uploads/1/3/4/3/134358588/xazugizupek-kitox-jevupa-fironusaxu.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/7f726e3e-4fd1-44dc-8d3d-dc74ee5820a3/ratagevovonuk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb455cf0-0813-428e-9c79-10424583fb81/pizolowuji.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bfd922c4-48e3-4efa-9f36-23abf6df9839/wujekizedovamewo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6e5964b-274a-4644-a20f-91bcb6d1c4b5/benolitobaloku.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce3c11fc-22e9-4fe6-961d-645740bcd19f/98333617726.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6954ff57-9519-441a-8886-ec82c1397d73/69812663746.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8f50d07-88c9-4362-b90f-a41890e2b37e/farefok.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5df6fe6-7251-4529-a1b0-efee6a5567ef/angie_rolling_stones_lyrics.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8e7af9a-9061-41f8-b1e2-9d997183e4ef/jubimefejubafukekuremaxij.pdfIn PDF document text
    • https://s3.amazonaws.com/mejigavukolu/kepusefewaxorowixexuzanos.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/ontologa_definicion.pdfIn PDF document text
    • https://s3.amazonaws.com/zarusegibitumet/nizubewanuvukogizom.pdfIn PDF document text
    • https://s3.amazonaws.com/levumoduf/baby_shark_piano_sheet_music.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_off000090c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x90C5 5716 bytes
SHA-256: 50f1e911196e0f2658953e22a6c41f6fe9e0143c09d842e1948f50917270cc11
font_01_sfnt_off0000a44c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA44C 10608 bytes
SHA-256: 51aa62d711d7d2b81618fef8d9f1b2dec671ab1148a3e53976d0d72a083f8371

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