Malicious PDF — malware analysis report

Static analysis result for SHA-256 671fbc5a6ffd574d…

MALICIOUS

PDF

48.8 KB Created: 2020-10-26 05:10:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: 51f4bd2f335fd6ed8e6347ad6133c5ce SHA-1: a22d9e20ed8d06478f01d866516aa9e278e5cd29 SHA-256: 671fbc5a6ffd574dbcb338dc9c784d845a3abb9cfe4a0376ea4fcb3f2e9d1e08
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://cctraff.ru/aws?keyword=rituel+pour+attirer+l%2527+argent+en+urgence+pdf In PDF document text
    • https://jewajufigojoxi.weebly.com/uploads/1/3/1/4/131438211/2536330.pdfIn PDF document text
    • https://fabedajigunud.weebly.com/uploads/1/3/4/4/134480588/15bd8a1a5b5e5.pdfIn PDF document text
    • https://kabudededawizo.weebly.com/uploads/1/3/1/3/131383409/da4292937454ee.pdfIn PDF document text
    • https://valuluxunu.weebly.com/uploads/1/3/2/7/132710491/270385.pdfIn PDF document text
    • https://jarapitoxedomel.weebly.com/uploads/1/3/1/4/131437170/1486329.pdfIn PDF document text
    • https://rusuligoxajikug.weebly.com/uploads/1/3/4/3/134399392/5977884.pdfIn PDF document text
    • https://gagumosesixibo.weebly.com/uploads/1/3/4/0/134018544/lenazirujadig-sodolabido-rudeze-pofawedusisuti.pdfIn PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/sulusilalope-jobede.pdfIn PDF document text
    • https://sakukavazu.weebly.com/uploads/1/3/1/3/131379729/6258819.pdfIn PDF document text
    • https://disaxugotusineg.weebly.com/uploads/1/3/1/8/131871710/xadasifezim_tidakudazexo_pafaz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382958/normal_5f8c026e098e6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388065/normal_5f913b6f45c03.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370092/normal_5f89f5db590eb.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00006f69.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00006f69.bin)
    • http://www.daltonmaag.com/In extracted file (font_02_sfnt_off0000a4c4.bin)
    • https://s3.amazonaws.com/henghuili-files2/wedizovaxiwebekagogi.pdfIn PDF document text
    • https://s3.amazonaws.com/dejolavubukugeb/je_suis_amphitryon.pdfIn PDF document text
    • https://s3.amazonaws.com/memul/duzek.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/daa7c9a2-5108-43db-9a19-e044ea7ea120/kilinodafege.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/503416e6-db3f-4baf-922f-5a626ab99eef/cnn_spin_off_crossword_clue.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/69f595e8-a5ed-4eb6-ac78-226e50330447/36314500199.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/044fe470-2e1a-468e-8bb1-166bac387364/83184800458.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da11e1f0-4266-4ac9-a1ce-da9ea55bf6d2/gidoti.pdfIn PDF document text
    • https://s3.amazonaws.com/vukumesoj/average_velocity_and_instantaneous_velocity.pdfIn PDF document text
    • https://s3.amazonaws.com/gozilum/acrobat_reader_converter_download.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/best_ebook_reader_for_ios.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/15763993809.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_off00006f69.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006f69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F69 5068 bytes
SHA-256: b10a69015f84a0ae703afb7428760e8b5dc8c9554cc06c38f06dd5e12f414f2f
font_01_sfnt_off000080be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80BE 11376 bytes
SHA-256: d4520186a6f4e4c5a5620f0b7942d4c7a7bc4bed1ee788f2230dc3c3b829e28a
font_02_sfnt_off0000a4c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA4C4 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3