Malicious PDF — malware analysis report

Static analysis result for SHA-256 3adeec349649f437…

MALICIOUS

PDF

48.6 KB Created: 2020-10-23 15:46:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: dbac73404e8e19298a6d455b4738c826 SHA-1: 628f5adf492c97e08f897e1cd1d87f9a648ca413 SHA-256: 3adeec349649f437aea58d9bb7243e2f752cbe0db503df850929fa19b56cf2ff
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/aws?keyword=diferencia+entre+equidad+e+igualdad+pdf In PDF document text
    • https://sadoxeliwuduw.weebly.com/uploads/1/3/4/0/134040540/kisixo-lunetovorubi-xubarazubet.pdfIn PDF document text
    • https://xuzowezawejinat.weebly.com/uploads/1/3/4/3/134378303/67842.pdfIn PDF document text
    • https://wekubuzebebam.weebly.com/uploads/1/3/0/7/130739705/vewugipi.pdfIn PDF document text
    • https://mojivimimujovo.weebly.com/uploads/1/3/0/8/130874437/xefafimofaxeparekuji.pdfIn PDF document text
    • https://zavomafig.weebly.com/uploads/1/3/4/3/134356936/fopadudajebaf.pdfIn PDF document text
    • https://musiwimo.weebly.com/uploads/1/3/4/3/134359140/7502427.pdfIn PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/vunud.pdfIn PDF document text
    • https://fakimodixoto.weebly.com/uploads/1/3/0/7/130739088/8149546.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374840/normal_5f91d4eeaeb7a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380522/normal_5f90cc449f616.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370791/normal_5f926ce0e5446.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365638/normal_5f87202b80ed4.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00007b4f.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00007b4f.bin)
    • https://uploads.strikinglycdn.com/files/44366036-46fe-41bd-aec6-673dd073629a/robert_bringhurst_the_elements_of_typographic_style.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1c3c4c8-e1f7-4a0d-9f09-66b74d5868d3/youtube_mate_apk_mod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee27adc4-f318-4b50-8d31-b09393431e84/mc_ren_torrent.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da63e2df-221d-4dba-a121-bff259ccdd50/kutanapixalawel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9487d852-cd42-4ce8-9ab4-2d8f800cc510/pamir.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/51416209567.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/90866048766.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/fasesubijutujoweregejas.pdfIn PDF document text
    • https://s3.amazonaws.com/rimepusox/79989432021.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/45124423867.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/tamilurew.pdfIn PDF document text
    • https://s3.amazonaws.com/levumoduf/leon_d_orthographe_cm2.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files/libros_de_centrales_termicas.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_off00007b4f.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007b4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B4F 5268 bytes
SHA-256: 83f1ab2a1648a228d3bf90a59b1a7946bb780cc992640b93b5f03e715920ffbf
font_01_sfnt_off00008d4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D4A 11576 bytes
SHA-256: 78572848a6ef252e5311f83f05b4c83663acd75e4e217d62bdeff067d759e6f9