Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a658af1afe91376…

MALICIOUS

PDF

47.6 KB Created: 2020-11-06 15:58:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-15
MD5: cc204a8db52cfdb7e0dcf5df90505151 SHA-1: 57e310b636776fe5368691bca866dc8df911a33e SHA-256: 1a658af1afe913761b3fd3ee18b5686be03addff3c63673c022c853187eda3e8
136 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.
  • 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.
  • 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://traffset.ru/123?keyword=achievements+of+the+ancient+egyptians PDF link annotation
    • https://tagekoworiz.weebly.com/uploads/1/3/4/0/134016686/837b7.pdfIn PDF document text
    • https://foxagizak.weebly.com/uploads/1/3/4/3/134332010/pesatetowozidux.pdfIn PDF document text
    • https://xikosenazegan.weebly.com/uploads/1/3/0/7/130739601/kalorup-bofirok-zemisafiziwimu.pdfIn PDF document text
    • https://norumevi.weebly.com/uploads/1/3/0/9/130969469/kobejalomawesuf.pdfIn PDF document text
    • https://ziperivowupidu.weebly.com/uploads/1/3/1/3/131381589/5104848.pdfIn PDF document text
    • https://ruparowix.weebly.com/uploads/1/3/4/3/134350000/77e6e42f41faf20.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/bfc4fc88-7e0f-4278-bfc4-bd59e06359ea/70646781983.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5359bf8e-24fb-4819-9d69-7606da714343/98782413374.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae077174-b6cd-4b79-9325-3707bb7aced1/sevtech_ages_download_tlauncher.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4674b249-fddc-4016-b0d5-3394602db987/dafesamebuje.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5826be9a-3cc7-4c63-9689-4d38d715864f/ccna_wireless_200-355.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d2a60bb-b792-43df-b568-a7ec63e68266/sobuwedesuga.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02e4134d-614e-4590-b18f-cd484b192a5a/tap_windows_9.21_2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d058a22-0960-48dd-8f20-00942dfdd877/60726546439.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db53eaec-b144-4f66-9963-3993587ea445/ejemplo_de_cita_indirecta.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_off00006b8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B8A 5240 bytes
SHA-256: 61af553660664eca05044dd948c4e7baa32535a8b8bfef17ef2437abf3cc5a8e
font_01_sfnt_off00007d4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D4B 11072 bytes
SHA-256: d06372bbb034f345d57c947ec49abdc4fcf5334333da94b96dde6d9b333dcf1b
font_02_sfnt_off0000a2e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA2E1 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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