Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5ff48d377bae904…

MALICIOUS

PDF

44.3 KB Created: 2020-11-08 06:09:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 71c3ddcb7805e29e93e7101ac2c9f2c2 SHA-1: cafb411fa62d158ee31da979d96077cca5c59d82 SHA-256: a5ff48d377bae90420263f74a7b7a880243b55044ba1c6733d49c508aba63b8b
76 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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/aws?keyword=edtpa+task+1+lesson+plans+passed PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4374983/normal_5fa2f6eb34c49.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369659/normal_5f913b1e6d517.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380403/normal_5f9bba192147f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375083/normal_5f8d3ba595bd4.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/divelatoxa/17972959141.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a3638c6a-ed2b-4bbb-88eb-7c623a42bf6a/gekapojubedudi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bfcecbb8-2d4d-445b-840d-ff8b17b7e027/zolixuniwasuju.pdfIn PDF document text
    • https://rakidate.files.wordpress.com/2020/11/75526435599.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/26df81b0-ea3a-45e9-bd81-d80cf8667d13/91445954221.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be0028e8-e204-4869-9502-9f7502fa7abb/musica_cristiana_instrumental_mp3_para_bajar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/48484e3b-fa70-49fc-b57c-475f29d18ede/21410685768.pdfIn PDF document text
    • https://pidukok.files.wordpress.com/2020/11/52241195664.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_off0000631a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x631A 4672 bytes
SHA-256: 3b679003ee0f6158d132ed1f65c776e124047f1d4f2ed4e65d2d0a3a132efb77
font_01_sfnt_off00007311.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7311 10368 bytes
SHA-256: 92275cb7fbdc6c1ee158d65d4171d802aa5c1077b6607ff0c62a9b9aba66e9ea
font_02_sfnt_off00009661.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9661 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3