Malicious PDF — malware analysis report

Static analysis result for SHA-256 992984dceb7039a2…

MALICIOUS

PDF

43.8 KB Created: 2020-10-25 08:54:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: 9cd44dfe94c3fa4ec1f7d027eb2f50b3 SHA-1: 4b421c00258c733fee5cb8055fcd3a132c982d50 SHA-256: 992984dceb7039a2f19e1cbcaaeadf55f7ad2f49c9eb2256f792a78e3c4b44fa
184 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.
  • 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.
  • 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=emotional+first+aid+pdf+download In PDF document text
    • https://tenabawik.weebly.com/uploads/1/3/2/7/132710661/9165533.pdfIn PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/runemevurexuziwone.pdfIn PDF document text
    • https://wefamojugibe.weebly.com/uploads/1/3/1/1/131164519/3688024.pdfIn PDF document text
    • https://nikokabiliru.weebly.com/uploads/1/3/1/4/131409463/rutiziz_muzub_gawek_vumolumapelot.pdfIn PDF document text
    • https://fijojonibiw.weebly.com/uploads/1/3/2/6/132681787/613a711ec7ef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365653/normal_5f8c24e28b519.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369656/normal_5f8918c05f4c4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367645/normal_5f87666e69a5d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375891/normal_5f915a853ab83.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365638/normal_5f86ff8501e40.pdfIn PDF document text
    • https://lujisitezolip.weebly.com/uploads/1/3/4/1/134109273/162078f9dcc.pdfIn PDF document text
    • https://zoxuzuxebexot.weebly.com/uploads/1/3/0/9/130969059/3079835.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00006be7.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00006be7.bin)
    • https://uploads.strikinglycdn.com/files/043208f7-1f55-4f9d-b79e-8d1773017d63/30662253089.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5419e4b-685d-46a6-aa44-408ddc5c38b4/bafemabigopifawapofunefi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b58313aa-7295-4216-aae3-46fce7f1eb37/tebuvele.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f570eb2-9d21-44cf-a90d-cf3a73ac8b78/36498198096.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/31c82245-c05a-401f-8526-f2f51a09f9ad/20784511884.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/32186774961.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/aircraft_air_conditioning_and_pressurization_system.pdfIn PDF document text
    • https://s3.amazonaws.com/wikurixobelu/bise_lahore_9th_class_gazette_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8dfa0ff7-a9f5-43e3-8fea-c3ef210be95f/dujasefamemibijekawopup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/807b0d99-23cc-43cd-86b7-c5386af76b8e/lubovuvibefeg.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/044fe470-2e1a-468e-8bb1-166bac387364/83184800458.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/06af3816-558f-451b-ab31-86a8a4471669/berlin_calling_album_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 extracted file (font_00_sfnt_off00006be7.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006be7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BE7 5236 bytes
SHA-256: 77fcd08484164e5bb04f6be6bc8c4f6c54476f335d737841d994d67881af352f
font_01_sfnt_off00007db2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7DB2 10280 bytes
SHA-256: b0ae535fad973efad0920cf3169cc303c8aeddda756a0a19840c80bcaf35a753