Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f264f20103c6132…

MALICIOUS

PDF

40.9 KB Created: 2020-10-04 01:04:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 8f5518d03be5a13d196fad6ca13f241b SHA-1: bb8a906c710fe76ed755ee871dcdce4dfb00fadb SHA-256: 2f264f20103c613254b413370d7e52017a25aaa401a3b8afcff7d381f5cfe443
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://ggtraff.ru/strik?keyword=adoration+prayer+book+pdf In PDF document text
    • http://files.whyyoumatter.org/uploads/1/3/1/8/131871405/jefofakaxu-mamopuka.pdfIn PDF document text
    • http://mulodu.allanimalclinichattiesburg.com/uploads/1/3/1/3/131379021/5a04a1e7cf08b.pdfIn PDF document text
    • http://files.sarahaprea.com/uploads/1/3/0/8/130874395/kosokajasiladuxabat.pdfIn PDF document text
    • https://site-1036884.mozfiles.com/files/1036884/didowipipa.pdfIn PDF document text
    • https://site-1039297.mozfiles.com/files/1039297/94973605013.pdfIn PDF document text
    • https://site-1037824.mozfiles.com/files/1037824/5414673850.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/b7f1cfae-548b-4ca8-bdb9-ea09c1948d49/84812017444.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d02423cb-6f06-4275-b4ea-03ba2e5cc553/7892816137.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e657e45-adf3-4eb5-a36e-26fdbc2d7ed0/11860672511.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1c253cd-b079-4fab-bcd2-d1ea314cf1bc/judodapajubanarefeteraf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/68faf43b-d8ec-4665-84c6-c5d0918608d9/linebepatokoviralabimiwel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8661f255-eee4-487f-82e0-6a34e103a398/difofesepaxisotazodewis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/85923323-ad97-483a-a70d-3777cd7b5cfd/sorigufubanolugitejos.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_off0000639e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x639E 5120 bytes
SHA-256: 404d5e91a165abe0ec014ce0bf47f4b18932fb8b866ee3849d652fb37f4a93f3
font_01_sfnt_off00007521.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7521 10052 bytes
SHA-256: 51572e80379f6be810160729640cac0b4d111bc0e8717d4c78367edc941c2714

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