Malicious PDF — malware analysis report

Static analysis result for SHA-256 5575569ba782a49f…

MALICIOUS

PDF

46.2 KB Created: 2020-11-08 22:08:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: 5f2e0684bdc330f659a69755afbbf2ae SHA-1: 204f1033e5c6ca8b3c6767a7bb2b14576b05483c SHA-256: 5575569ba782a49ffebf13887ad0a1982a4ccb9eb99bd5228b682c9a9d943fb1
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafficel.ru/123?keyword=electric+car+chevy+spark PDF link annotation
    • https://kusebedanosude.weebly.com/uploads/1/3/1/1/131163667/3297630.pdfIn PDF document text
    • https://feloxoxux.weebly.com/uploads/1/3/4/0/134000485/dd8fae50e81fb.pdfIn PDF document text
    • https://damijuvik.weebly.com/uploads/1/3/1/3/131381376/bakeloti_tuworonovof_lezafawov.pdfIn PDF document text
    • https://volinamonapefez.weebly.com/uploads/1/3/4/4/134494747/wevef-lukakulutigo.pdfIn PDF document text
    • https://birisudim.weebly.com/uploads/1/3/4/4/134467091/2134066.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://wotenopofe.files.wordpress.com/2020/11/budixaw.pdfIn PDF document text
    • https://s3.amazonaws.com/fedufiporara/manejo_absceso_perianal.pdfIn PDF document text
    • https://s3.amazonaws.com/pevuwarobuvowa/36121715819.pdfIn PDF document text
    • https://s3.amazonaws.com/kudefem/pda_to_cfg_algorithm.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/siletenisedifedi.pdfIn PDF document text
    • https://tuxabavijig.files.wordpress.com/2020/11/37940387668.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c36de4e-b3f3-4027-bf12-aa47294e8229/dr_munroe_myles_free_books.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000069d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69D0 4776 bytes
SHA-256: 9332d1a07e196f721068370e4c8dee223590df5ec612e55dc4ba69b27691a2c4
font_01_sfnt_off00007a25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A25 10564 bytes
SHA-256: 40ba78150ae5c0896c6c5bf6f8d26431d93f605712516c5f6b40d7a08be81d99
font_02_sfnt_off00009e34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9E34 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2