Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ad43c5a6aca571e…

MALICIOUS

PDF

34.9 KB Created: 2020-11-07 00:38:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-11
MD5: c5b198cf5ae8b88677ad5cffcd315d00 SHA-1: df94a66d6bed1732867317dcd9e9523faa35331c SHA-256: 1ad43c5a6aca571e0ee586a582a8ddf03e322d66bbdf2c957a0e15fac1283761
194 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://traffine.ru/aws?keyword=ashley+furniture+beds In PDF document text
    • https://dirigesibujov.weebly.com/uploads/1/3/0/9/130969991/setopovasewar-xijoj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409796/normal_5f9b1cc4167d8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/pisik/12155835152.pdfIn PDF document text
    • https://s3.amazonaws.com/ruzaganog/wuwabikoruzuveno.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/att_uverse_packages.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/10992073-3b2c-42bc-a1c1-267a70b934e8/72716911218.pdfIn PDF document text
    • https://s3.amazonaws.com/nokiva/15._which_of_the_following_statements_is_true.pdfIn PDF document text
    • https://lusabun.files.wordpress.com/2020/11/toyota_22r_4x4_extra_cab_guatemala.pdfIn PDF document text
    • https://s3.amazonaws.com/vonuxagupeduze/organic_chemistry_of_alcohol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d7e3eeb-68a5-4efc-b7cb-747ee0edc2f0/memivakibix.pdfIn PDF document text
    • https://sebuwisawos.files.wordpress.com/2020/11/fipupojuretis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3678de0a-7513-4daa-ae88-91f6e2c64cce/dryer_manual_kenmore.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_off00004bb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4BB1 5016 bytes
SHA-256: 56d36d80434a39f2609972d5c4f672384e800afd9333913d5c3565c1f960c03e
font_01_sfnt_off00005cc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5CC4 10040 bytes
SHA-256: dbd07c7651b815e0f983d617219255caa7cc0f8372c72b6345cb1e375da01433