Malicious PDF — malware analysis report

Static analysis result for SHA-256 571fd57e76a74ba6…

MALICIOUS

PDF

32.5 KB Created: 2020-11-06 08:41:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 0069bde3fcf8b50786f84de8e8510320 SHA-1: 5ccd20f9820670176e48287e55bb87c9d5f454a6 SHA-256: 571fd57e76a74ba6c1d5e2cdc64021c9d2434a2e2392ceb8a8daea390f2762e4
134 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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://traffking.ru/123?keyword=dr+michael+mellman+boynton+beach+florida In PDF document text
    • https://cdn-cms.f-static.net/uploads/4365624/normal_5f871cbb2c724.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379237/normal_5f937f509e60f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380522/normal_5f915dba2b200.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366947/normal_5f873ff46eba8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366319/normal_5f8712c7d7f45.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413564/normal_5f9e7b12010a0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405644/normal_5f9478fb1ef46.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/9c92466f-99e4-42f9-b599-117aa01ad3fb/twilight_fanfiction_bella_and_denali.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb1b23e4-1172-49d0-a7a9-b547fefd2769/atlas_de_anatomia_gratis_para_baixar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5fa8a9b-5109-44a1-9e58-09ef71b798ad/siperipovugux.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df393bed-0f00-40c7-9781-a69e8f4b64ab/lifesaver_smoke_alarm_model_1275_instructions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1e622ae-3d59-4470-ac09-675fd2611acc/bruce_ranger_harness_driver.pdfIn PDF document text
    • https://s3.amazonaws.com/dazinibonofobi/questes_de_administrao_pblica_com_gabarito.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/905e4296-08c5-4e5a-a0e9-ffe953df0c46/55095580687.pdfIn PDF document text
    • https://s3.amazonaws.com/xetasif/investigating_characteristics_of_quadratic_functions_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/jumedemimo/train_sound_effects_free.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_off0000434d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x434D 5324 bytes
SHA-256: 87df68a8c1b56a5e7c9774cdf2341aee7d40e80aa0be3e538457fac91d2eac0b
font_01_sfnt_off00005546.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5546 9808 bytes
SHA-256: 5d54fc75f03e56e0a8023dd6160e8f4fdaa21eb105491eab01c6a4dd50d0e637

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