Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff3abeb210b340e8…

MALICIOUS

PDF

45.7 KB Created: 2020-11-02 13:52:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 73f3164efb3f4164f4e7413dbb078699 SHA-1: e019c1809f294d77c50c62e2de622fb0c1f0a2d8 SHA-256: ff3abeb210b340e8c17f4a48a9c92775bd54677e087f962e7f342e472e16783d
212 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 7

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=shareit+apk+download+free In PDF document text
    • https://zemuxarasojutin.weebly.com/uploads/1/3/4/3/134374283/bevibewozu.pdfIn PDF document text
    • https://dowikonusinewe.weebly.com/uploads/1/3/4/3/134374018/sejadiguv.pdfIn PDF document text
    • https://rabexowubomisuw.weebly.com/uploads/1/3/1/4/131407155/ferodejukobamun-nonira.pdfIn PDF document text
    • https://saxexowiki.weebly.com/uploads/1/3/0/9/130969873/sokodivuniwa_gamirek_zerezodorukowo_gajib.pdfIn PDF document text
    • https://nepuvaduwixoki.weebly.com/uploads/1/3/4/5/134525355/7310819.pdfIn PDF document text
    • https://vujuzujotug.weebly.com/uploads/1/3/4/4/134478410/6826643.pdfIn PDF document text
    • https://mabudorowux.weebly.com/uploads/1/3/4/4/134458492/selolobozetefasasux.pdfIn PDF document text
    • https://votarozoxanobo.weebly.com/uploads/1/3/4/3/134315144/nuses-labavejo-neruwiru.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/dc31638b-77e6-46fa-97ec-8d96f57ee0de/zupasiwig.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb0e89c5-f19a-4305-b74b-430d15b1e165/33222288359.pdfIn PDF document text
    • https://s3.amazonaws.com/padadutiseni/r_and_s_organic_chemistry.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de719bae-0095-4a42-800c-b3b5edc10c4c/nasiburejedurevaxepek.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6fe7d8a1-2af4-4e60-90c8-8c2bdb11ef05/accounting_technician_study_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/gejedojuxuxapove.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_off0000739f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x739F 5208 bytes
SHA-256: 67dcb9bc9a7c2793bf8d6dbb9dcde87f2ab315a20cc304f2cf4fd1ba09ef81c3
font_01_sfnt_off00008563.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8563 10740 bytes
SHA-256: 79cc3c258f959ad6493d8dfac292c4c77a3a1cb11f0cbf6705be1f3fd0ec0496

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