Malicious PDF — malware analysis report

Static analysis result for SHA-256 93a9f31fe2a5b18d…

MALICIOUS

PDF

52.3 KB Created: 2020-10-25 21:37:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: a7359ea543b71c91043f80b39207fcd8 SHA-1: 2d3f49440421df1323c83aea75f8752efa118ee5 SHA-256: 93a9f31fe2a5b18d899cd842894e1f39b65415cfbdba82a17a1113dd2edccbd1
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://gettraff.ru/aws?keyword=best+vocabulary+words+with+urdu+meaning+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366408/normal_5f872652e208f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375093/normal_5f89415fc2972.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367919/normal_5f88f0e9d0d2d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365549/normal_5f875ba4950d5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378830/normal_5f94378b25802.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367296/normal_5f88903a098f4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372707/normal_5f9529b31959d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367665/normal_5f930e312096c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368493/normal_5f8bd21ef3897.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/cafb8120-a989-44ba-b497-d4ba0235cc15/varine.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a92f118-7528-4405-b2ff-a66e2f3ab4bd/texofuwigutodekoxe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/44861d73-5749-486e-9857-fdc06e985ea9/57175509050.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cabbb70f-4969-454b-8fa1-99f86a9294ec/c_programming_a_modern_approach_by_k.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b97fc9e6-2915-4d1d-a40b-8f236ec5ad32/kanilevar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3336a406-6d85-4aad-b2fc-9d5c8d903eaa/boboxabagaker.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/876c05c8-eea2-4e2b-a1fc-5df22fc984d1/sufegurafip.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/947e759b-0a82-4ef1-92c2-5630df3b9186/nagorogepu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/774069f4-e698-416c-acf4-01ea03f7127c/zofusajulekebafate.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/relationship_awareness_theory.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/hernia_inguinalis.pdfIn PDF document text
    • https://s3.amazonaws.com/regovadeje/davolo.pdfIn PDF document text
    • https://s3.amazonaws.com/turip/xibat.pdfIn PDF document text
    • https://s3.amazonaws.com/norozovijalu/63345440952.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f460a820-160d-4742-bc2a-80ff49c342a3/13893296848.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/594a76bb-0736-46dd-961d-04cb4fe255f3/12956040975.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ae93aa5-dc54-4bb8-a31c-0a56bcf1eb45/luteduwasuf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/830acba5-ecec-4e1e-843c-f8afd7e50bd4/gerenesareseru.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_off00008b8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B8B 6012 bytes
SHA-256: dfa9167665c0f65fc906966ac680f2b80f6ef032807a8d6c0e3bb52dc7e08f0a
font_01_sfnt_off00009ff4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9FF4 10284 bytes
SHA-256: 8ad1b180239fed9c4f3daa6891b92e118743aa1ca750bd39132a187de6658218