Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf154b50591e60cd…

MALICIOUS

PDF

44.3 KB Created: 2020-10-20 13:23:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: d0c10ffe935adafde8d53c7e10934245 SHA-1: 095fd2f1b1cb0d2d928711026afbd2aa37fadaa5 SHA-256: bf154b50591e60cd4e5948f36e57b74edc46af7143ceab232f2b88fc1f7a9ee8
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • 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.
  • 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://ttraff.me/123?keyword=amniofix+post+injection+instructions In PDF document text
    • https://cdn-cms.f-static.net/uploads/4367633/normal_5f8e10c98c6f7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373997/normal_5f89fc5a18714.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368265/normal_5f8cb7b76d1b3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369936/normal_5f88533dd8cd2.pdfIn PDF document text
    • https://gekeforoka.weebly.com/uploads/1/3/1/4/131438206/e65d3e9ce1ea2cf.pdfIn PDF document text
    • https://remewizefo.weebly.com/uploads/1/3/1/8/131856163/jezowogabusot_dajuxax_peloxidinivolup_foxilabeleturak.pdfIn PDF document text
    • https://varipejat.weebly.com/uploads/1/3/0/7/130739080/bobizagumulogiz-vawenedubedolab-zenixedigix-busokokeluraj.pdfIn PDF document text
    • https://dejolezeg.weebly.com/uploads/1/3/2/8/132815968/7603656.pdfIn PDF document text
    • https://tarirubawapub.weebly.com/uploads/1/3/1/6/131606173/webaz_xaxuxubigidezop_lotaduvupala_bisovexowidogir.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370268/normal_5f8e2d596b8a1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365586/normal_5f87085b1619b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366633/normal_5f8732c3e9465.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365998/normal_5f8716af85e8b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368226/normal_5f8e5831a02d4.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00006ca2.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00006ca2.bin)
    • https://uploads.strikinglycdn.com/files/d07538a9-d54a-46ea-aead-878e7c9f7119/tapiwidiwoxode.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/895ce458-16bd-4a8b-94ef-156fe3bd779a/11704582177.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/79050bd7-ac5f-4479-b1d6-e6e68b6f504a/vipaluwafubuwutonefonagon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/35435ccb-596b-4a49-b47c-0acd1e0ef7e5/43103397689.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f239d4ac-11c2-4ea0-84db-c4163d419c93/wuxitapom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae0f8fce-dc4e-4fdf-b731-3b8e4c3f3a77/69372913189.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d91fd0c-7b89-4f9c-8dc0-e708060ec3f5/54174661421.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a057f148-fcc1-4ead-8431-c78275621030/fuxawutafojutagugadifigam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/148d0d89-90aa-4945-a7ca-d9020a75106c/56617179995.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab17ce5d-4359-4046-b830-b79a70b4354c/97221536549.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/365f2951-afd5-43a6-9014-60c40086056c/noxifaxadexatipapevobe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8aa9ae3d-1e9f-40c2-9954-1c553ce51b64/feregi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a872efaf-f2f0-4661-8c91-91edc237195e/18040515376.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 extracted file (font_00_sfnt_off00006ca2.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006ca2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CA2 5052 bytes
SHA-256: bfc196803b3289f93c42fe1d7d884ba944e76d7b4d2483565108c3e03ee64252
font_01_sfnt_off00007dc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7DC7 10552 bytes
SHA-256: c330feee75a1e7fe16c3c3228b7fc16309d951b1867e5974d4dc1bd6c78c4785