Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd30ecc2f989ed72…

MALICIOUS

PDF

45.8 KB Created: 2020-11-06 14:54:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: a17f83b2ee7350117655de87d5742bbb SHA-1: 6767aed6396af3ab449fcb9a1b36f013e34f989a SHA-256: cd30ecc2f989ed7271d3d9cdc10ad8ee7d28324883f776215ef12da01184f649
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=civil+war+books+2020 PDF link annotation
    • https://jewadasin.weebly.com/uploads/1/3/4/6/134604584/3dee22777.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372101/normal_5f88c0ac67fc9.pdfIn PDF document text
    • https://guboriratuji.weebly.com/uploads/1/3/4/2/134235556/5d3cc0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403954/normal_5f949d969d125.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://s3.amazonaws.com/pukasojalu/wamuzojinibu.pdfIn PDF document text
    • https://s3.amazonaws.com/rowubunak/binedako.pdfIn PDF document text
    • https://s3.amazonaws.com/lovetijif/study_guide_for_seeking_allah_finding_jesus.pdfIn PDF document text
    • https://s3.amazonaws.com/vabedafozo/festo_make_pneumatic_cylinder_catalogue.pdfIn PDF document text
    • https://s3.amazonaws.com/genedesowul/section_197_intangibles_examples.pdfIn PDF document text
    • https://s3.amazonaws.com/posufij/random_choice_python_multiple.pdfIn PDF document text
    • https://s3.amazonaws.com/xamapebonijos/attack_on_titans_season_3_episode_16_dubbed.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/153850dd-8868-4fb1-a4f0-b6bc0b5871a8/marcela_gallego_celia.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/345a3e9a-e814-4f71-8151-a88ce9450616/eddie_bauer_car_seat_protector.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_off00006a2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A2F 4816 bytes
SHA-256: 3227e62ee9e79fd4f7d2aff9e5389c77e6f0eb804358d6a6867d5c98f5f6150e
font_01_sfnt_off00007aa1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7AA1 9880 bytes
SHA-256: 8fd94983a05a32240eb06848a261067c438c1e907bcbae3d0c601e218a226cc0
font_02_sfnt_off00009c73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9C73 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230