Malicious PDF — malware analysis report

Static analysis result for SHA-256 78f452d1aa0ce4d7…

MALICIOUS

PDF

45.9 KB Created: 2020-11-07 03:11:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 2e9b82159f4fa6d63034f5ddc84ca539 SHA-1: 6fe5da5abb05f9419ec7c5180515d2f2e0e91ca4 SHA-256: 78f452d1aa0ce4d78f59537e0dc92c7f4efc99c35c9aad5dcf1769ef0c4a3b67
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafffe.ru/aws?keyword=power+back+generator+5250+manual PDF link annotation
    • https://munazuzane.weebly.com/uploads/1/3/4/3/134350045/pelibilawurebo_fujekixupalul_lelapa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://gezovuxa.files.wordpress.com/2020/11/57095666811.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae779829-b034-425e-b395-b42d391c8ffd/mogalobupibodit.pdfIn PDF document text
    • https://tevarew.files.wordpress.com/2020/11/88608638079.pdfIn PDF document text
    • https://tirutijupez.files.wordpress.com/2020/11/93365146419.pdfIn PDF document text
    • https://lufefot.files.wordpress.com/2020/11/causative_verbs_in_urdu.pdfIn PDF document text
    • https://rukawakoxofo.files.wordpress.com/2020/11/shinmai_maou_no_testament_bd_season_2_sub_indo_streaming.pdfIn PDF document text
    • https://xobonub.files.wordpress.com/2020/11/tejubimowenifow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/27d36ee6-5796-448f-99a7-71e86950d1f0/78604465574.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/82f2c252-a75a-46df-b5fa-5deb54582fdb/22786232223.pdfIn PDF document text
    • https://zugipokojer.files.wordpress.com/2020/11/freehand.pdfIn PDF document text
    • https://damilum.files.wordpress.com/2020/11/personnage__habiller_maternelle.pdfIn PDF document text
    • https://xilatubak.files.wordpress.com/2020/11/85645498282.pdfIn PDF document text
    • https://botebofeji.files.wordpress.com/2020/11/15963812645.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_off00007136.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7136 5636 bytes
SHA-256: bacee8bd457cf5fb8965623a823c198ead27673bcd84b9e273f6c56fe8f2856a
font_01_sfnt_off00008474.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8474 11828 bytes
SHA-256: 0f9c90c1f73f768f2297247525a714bfceeda4badbd4767374bd98f969f83821