Malicious PDF — malware analysis report

Static analysis result for SHA-256 5de6e3ad92ad8a50…

MALICIOUS

PDF

43.5 KB Created: 2020-11-06 05:03:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 53e606bc1a3170fb67737fc17b689739 SHA-1: a133ff41241c0903f6f62e51cfb20eee5380a79c SHA-256: 5de6e3ad92ad8a50f60610d0b831eafc5ef0011f4b092359f6e8e93824e6734e
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://traffine.ru/123?keyword=identifying+functions+worksheet+answers In PDF document text
    • https://cdn-cms.f-static.net/uploads/4444378/normal_5f9d5790a3450.pdfIn PDF document text
    • https://sinevojixataxer.weebly.com/uploads/1/3/4/1/134131740/11f9abde679e.pdfIn PDF document text
    • https://suzokixuvajix.weebly.com/uploads/1/3/0/7/130776208/pazafipukanog.pdfIn PDF document text
    • https://nobozufale.weebly.com/uploads/1/3/4/3/134322784/wopipukisofev.pdfIn PDF document text
    • https://bogadisosupotaj.weebly.com/uploads/1/3/0/7/130776541/5226296.pdfIn PDF document text
    • https://masejufubalabej.weebly.com/uploads/1/3/4/3/134388341/beligegutiwaw.pdfIn PDF document text
    • https://siregudak.weebly.com/uploads/1/3/0/7/130738759/785c26ac87cc3.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/ce191ed7-1c35-4e2e-8d51-f1c5cddea210/an_introduction_to_reliability_and_maintainability_engineering_solution_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/82deefe3-f9c0-4976-8408-b8e5c8eaedda/volume_of_composite_figures_worksheet_5th_grade.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/61103771373.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43a61cec-e081-40da-a13b-4f114a1d760f/85607084284.pdfIn PDF document text
    • https://s3.amazonaws.com/wogikokuzotaxa/eduardo_galeano_livro_dos_abraos.pdfIn PDF document text
    • https://s3.amazonaws.com/kawotexulozax/words_start_with_letter_g.pdfIn PDF document text
    • https://s3.amazonaws.com/jaburirarov/51055509624.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_off00006995.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6995 5444 bytes
SHA-256: 57b17bd07b90d0dc51b37a4c44817d031286131bb28f8c693cea0fb878ddb1c0
font_01_sfnt_off00007c38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C38 10884 bytes
SHA-256: a45daaaec1a92e420549c9fd7012a0f43bbc3400161449bf77940229fdaed846

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