Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0abce7aa660e82d…

MALICIOUS

PDF

44.0 KB Created: 2020-10-10 02:32:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 74fef1c5e98a8fef99b09cb951fdeeb2 SHA-1: 0f983117164083f402450f4da40fe5701ee6f119 SHA-256: d0abce7aa660e82d3e5eac3e85f0defa2aff1b11e74fb9b3acb7ab88e439195a
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://cctraff.ru/strik?keyword=mon+petit+chou+a+la+creme In PDF document text
    • http://files.hannahmassagetherapy.com/uploads/1/3/1/3/131383648/2073405.pdfIn PDF document text
    • http://files.gammapsionline.net/uploads/1/3/1/4/131406222/rirapigaf_zukodezopanipo_rerugifagosejog.pdfIn PDF document text
    • http://files.memorial-videos.com/uploads/1/3/1/8/131856539/nifatomozunidulogaxe.pdfIn PDF document text
    • http://files.fusionofironandearth.com/uploads/1/3/2/7/132711949/953d6f3ad565.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/0691/3435/files/blue_stack_install_apk_file.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/7115/4592/files/tassimo_coffee_machine_uk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0377/2056/files/science_process_skills_definition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/5519/7593/files/hardwood_floor_nailer_compressor.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/7662/6848/files/toefl_essay_samples.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a9995a7-1008-4727-abda-fb818ec86bd2/xewenedagetajebomudijetow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/68e2e786-d408-4aa7-b1ed-a5f7866cbdc6/wefewu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e981fc3a-5118-4e04-bbc9-927958e62227/kazakarubamupizoxofa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da83a959-3e61-4df4-8407-7747928e1d43/leteratitatola.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/59dc0d4a-4633-4585-83e5-a7bcc66e3529/rezegexesavutijevel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce8a37cb-2a5c-4afa-b274-df250fc76651/16544620219.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bbca232a-0bb6-47b9-9eba-a889a8b7e201/61689317706.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_off0000670d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x670D 5000 bytes
SHA-256: c994cb780780001d577097ba0eeacf3c70f57c4c6eabfdc3369a3d7e1f355372
font_01_sfnt_off000077ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77EE 14128 bytes
SHA-256: 2c30c9504a22e892ea6afaabbb3d31944c3b48f2a839edbf275c2678c1a171bf

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