Malicious PDF — malware analysis report

Static analysis result for SHA-256 057d9fc1b74b98ae…

MALICIOUS

PDF

43.6 KB Created: 2020-10-14 23:40:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 4a2daf69f354aa9d8401f99283340463 SHA-1: 3527885ed8a0ddd5a3a78fe7a7cfc7686747cf4f SHA-256: 057d9fc1b74b98ae3c23f082a692f9a053f87e09caf4a6d63681bd06a1b16b17
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://cctraff.ru/123?keyword=ultimate+guitar+apk+pro In PDF document text
    • https://cdn-cms.f-static.net/uploads/4365540/normal_5f8725aca336f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365542/normal_5f87560e619ac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366028/normal_5f87502360f6c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366993/normal_5f87451012bb9.pdfIn PDF document text
    • https://site-1036644.mozfiles.com/files/1036644/jonolotunemela.pdfIn PDF document text
    • https://site-1039707.mozfiles.com/files/1039707/75706612347.pdfIn PDF document text
    • https://site-1043876.mozfiles.com/files/1043876/22187371354.pdfIn PDF document text
    • https://site-1037265.mozfiles.com/files/1037265/11648930062.pdfIn PDF document text
    • https://site-1040885.mozfiles.com/files/1040885/tajewuvitosabeje.pdfIn PDF document text
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/297c0.pdfIn PDF document text
    • https://mogilifus.weebly.com/uploads/1/3/0/7/130739831/bosilo_ginasesif.pdfIn PDF document text
    • https://jatorogerujew.weebly.com/uploads/1/3/2/7/132710569/1302795.pdfIn PDF document text
    • https://rezizeme.weebly.com/uploads/1/3/0/7/130775554/aaa1b366bd7fe.pdfIn PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/sulusilalope-jobede.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/b219cfc6-4bf9-4117-8001-a05b80409e32/nerezejoneg.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/20d49bfa-b8d5-43a9-a8a4-51d4e3e3eb5c/rusajasutumizufasub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/85d70f0f-fcb6-4c9d-b784-495866ce7774/kituwug.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/72881771-acee-46ab-adba-de353cd3d872/lizibezupolovusopenuginez.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/08415e33-f1c4-45ed-bdf3-6072a246ca6a/6324626564.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4987/6641/files/vofetewikipik.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/3325/8915/files/mugawipokegarakemojej.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_off00006d89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D89 5016 bytes
SHA-256: 88f3c7238c462b897eb915cd7ad33dc4b9884065a73f7a0626e4f600cc59c3d7
font_01_sfnt_off00007e80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E80 10032 bytes
SHA-256: ca8725e1f0c42389af9369b12c0b7f7893a54c42847d3171eccef078a51a566f

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