Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5d6362de0b038b8…

MALICIOUS

PDF

43.3 KB Created: 2020-10-31 02:16:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-03-01
MD5: 19acc2676908c7de6d0e41224f75105c SHA-1: 85a1ba6a70aabac2e5fb1e1cd6a5fad6a5429680 SHA-256: c5d6362de0b038b8f07d925cbac3e1c83546a6ee4b0142772d609cbf3fa6d448
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/123?keyword=samsung+soundbar+remote+code+spectrum In PDF document text
    • https://wekubuzebebam.weebly.com/uploads/1/3/0/7/130739705/regagu.pdfIn PDF document text
    • https://linezeludamaxen.weebly.com/uploads/1/3/4/3/134340908/tidejen.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380392/normal_5f8f35b1c9ae0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422134/normal_5f9af1b6b09ce.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388827/normal_5f9ae8ab7389f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410013/normal_5f99215bed605.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365598/normal_5f885e84384e2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405641/normal_5f9453a281731.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fikuvine/nesutowuzajopeninafikobuw.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/2829321469.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c026ccb-59d0-4c7c-bf64-e231b430a7ae/votagafekafimogeluge.pdfIn PDF document text
    • https://s3.amazonaws.com/luropi/52046210405.pdfIn PDF document text
    • https://s3.amazonaws.com/kovilowab/zepelotafomu.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/tulugugidetovuditunuseji.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51cba9ea-dc34-4a77-b411-c03750d58a7e/61963407042.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/verypdf_to_word_ocr_converter_crack.pdfIn PDF document text
    • https://s3.amazonaws.com/bezegoluzose/bofemepi.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_off00006879.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6879 5604 bytes
SHA-256: 19020c6903c9681ddc777c803d8236875deb200f799710da5bcfdbd302f87ad3
font_01_sfnt_off00007b6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B6B 10644 bytes
SHA-256: 79c18ee09a554f24f13018f14357af55a2ad028466ee5e70aa84a54c3abbe1f8

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