Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c8db30de91826f5…

MALICIOUS

PDF

52.3 KB Created: 2020-10-26 11:23:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: 7b9a4bd3eafab667bfdfbc1bbd99e6ca SHA-1: 32bce94669cba19cd0f9aea7f20dd3d8a38ce399 SHA-256: 1c8db30de91826f5c3115c30d08063eeec9aa1b2e628b6d8a33860aba734aba6
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://ggtraff.ru/pify?keyword=acute+coronary+syndrome+esc+guidelines+2020 In PDF document text
    • https://sibakixode.weebly.com/uploads/1/3/2/8/132814768/be9d745.pdfIn PDF document text
    • https://juragubiv.weebly.com/uploads/1/3/0/8/130874328/ridoxugo-nefufirugakusi-pevogomoxi-relomikututezom.pdfIn PDF document text
    • https://mujetuzavos.weebly.com/uploads/1/3/4/2/134266282/9003585.pdfIn PDF document text
    • https://tenagudewujuga.weebly.com/uploads/1/3/1/1/131164273/aba6767fe610.pdfIn PDF document text
    • https://vezorobabuwej.weebly.com/uploads/1/3/0/9/130969079/1174120.pdfIn PDF document text
    • https://gobumireg.weebly.com/uploads/1/3/1/3/131383916/sinebus-mubidodukij-balud-vodagil.pdfIn PDF document text
    • https://deledixedebudon.weebly.com/uploads/1/3/4/4/134499708/loserofu-dafawik.pdfIn PDF document text
    • https://kuromazu.weebly.com/uploads/1/3/2/6/132695519/ferujabugu_tisesigavopola_fosanumogesa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/a642e343-c2e3-4bd2-b82c-cbd5cd9f7fb4/78741635676.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43d6a1cd-fb7b-450e-aedd-607652a49406/spreadsheet_excel_writer_php_example.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b20ac75d-5e44-419d-891e-d80a4e050063/sariwubidekotaropevujel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a1404ff7-2de6-4109-b47f-d8a4d16e639d/84354239489.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d485ce6a-bfce-450f-90d5-36c36a5cf349/21519171449.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/92185547724.pdfIn PDF document text
    • https://s3.amazonaws.com/somamere/brunner_and_suddarth_11th_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/fasanag/ponixemubaxet.pdfIn PDF document text
    • https://s3.amazonaws.com/xefejevife/12158292292.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/78359234888.pdfIn PDF document text
    • https://s3.amazonaws.com/sojebelevenex/megetaje.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3137090-fc13-4c64-a8a0-63c0ea49768f/vixovujaju.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/97d2af4d-f155-49ae-93eb-f93254b53064/9898273532.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/adfd593f-f0ea-40fd-8594-6fecbaf32ac8/96337344526.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76e57042-9551-4adc-afc7-f59ed175b92e/42935682733.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cef508c0-67a4-413c-86e9-cc1bf1e090c6/93629073089.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007d21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D21 5508 bytes
SHA-256: 591ec4125b81d1b12ae291e4f64d26d0459a80d4fdc3bee1777431d483103fbf
font_01_sfnt_off00008fbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8FBF 11012 bytes
SHA-256: 35a4e785cd99615692bc64405af9afaa4e87ed3390f8649a4084c472ce0650f7
font_02_sfnt_off0000b546.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB546 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3