Malicious PDF — malware analysis report

Static analysis result for SHA-256 c55ca00892e314a5…

MALICIOUS

PDF

49.1 KB Created: 2020-10-15 22:23:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 1078f5e9c8557590e7af64a247e2ec60 SHA-1: a9f22b98f97fb8b1d8cdfb332698d6f33c0b4a3d SHA-256: c55ca00892e314a594aa14258060c1a10ecf06a148f255834e79bfa4117b5dbe
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/strik?keyword=unfollow+all+instagram+apk+download In PDF document text
    • https://gusumadanu.weebly.com/uploads/1/3/2/6/132695601/bobov_subuf_bamapawunuj.pdfIn PDF document text
    • https://jufaxexave.weebly.com/uploads/1/3/0/7/130775513/2c21e350ba.pdfIn PDF document text
    • https://xonuguzuv.weebly.com/uploads/1/3/1/3/131382030/1469b8.pdfIn PDF document text
    • https://jatorogerujew.weebly.com/uploads/1/3/2/7/132710569/rebodi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365575/normal_5f86f4001a788.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369638/normal_5f888d8d11005.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366351/normal_5f875efc63e83.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368949/normal_5f87b6e11a917.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366397/normal_5f875fb411f6c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365542/normal_5f878a561ed83.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365563/normal_5f879f7e30781.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369769/normal_5f8862bfdb8bb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366044/normal_5f875e4c1ba25.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366949/normal_5f874f14c969b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368235/normal_5f87d2b034a2f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367273/normal_5f8893bc7c76d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366003/normal_5f872023560fd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367007/normal_5f87a30e9f72c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/1223/3667/files/zasumawomokasizazili.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4944/2715/files/night_train_to_lisbon_novel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f9bbbcf-9cb9-4869-80ef-3b4313794802/94656322415.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd469ba6-0cd6-478e-bae7-929fd0878c31/77421067677.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_off00007f5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F5C 5508 bytes
SHA-256: 58c1150fee2d7caeed5b3c8c49327ce31cf5c8c24122e1553c4da764bfbe2bdd
font_01_sfnt_off00009215.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9215 10748 bytes
SHA-256: f5beaa41e6c961fd592e721007ebe758a12cdf312592ff8d9d108301ef8d1871

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