Malicious PDF — malware analysis report

Static analysis result for SHA-256 f11015241e015487…

MALICIOUS

PDF

47.3 KB Created: 2020-11-06 02:11:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: 040b9145a0a5c40144a95da551361456 SHA-1: e307100bfc9076566329f7a2e214a9ed099d07d5 SHA-256: f11015241e015487d0a3fe7b247a632ff1b4ddd572bb7525f70aecc0a7c0c7f9
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://trafffi.ru/aws?keyword=roblox+bloxburg+scripts+pastebin+2020 PDF link annotation
    • https://rugurujumififez.weebly.com/uploads/1/3/1/3/131384765/869970.pdfIn PDF document text
    • https://tubenuluni.weebly.com/uploads/1/3/1/4/131437864/watokifijesomozebef.pdfIn PDF document text
    • https://vukumurumijolot.weebly.com/uploads/1/3/4/4/134433046/kurotusagipox_wumokamex.pdfIn PDF document text
    • https://lifafogiter.weebly.com/uploads/1/3/4/3/134321186/0018646335.pdfIn PDF document text
    • https://wosezobar.weebly.com/uploads/1/3/1/8/131856012/tofilixeludofaxofujo.pdfIn PDF document text
    • https://pirizujimo.weebly.com/uploads/1/3/4/4/134454944/loponedubogikiz.pdfIn PDF document text
    • https://dajifavetesa.weebly.com/uploads/1/3/4/2/134234726/1303765.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://s3.amazonaws.com/jivuxo/52700784178.pdfIn PDF document text
    • https://s3.amazonaws.com/tesodagiwor/sosupokobulogejupubu.pdfIn PDF document text
    • https://s3.amazonaws.com/forupokisip/kodovivuv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14f88064-6ec0-4c96-8792-13ac52893de6/rugup.pdfIn PDF document text
    • https://s3.amazonaws.com/liwafo/sesup.pdfIn PDF document text
    • https://s3.amazonaws.com/jezaxojipevu/caliph_abu_bakr.pdfIn PDF document text
    • https://s3.amazonaws.com/damerirazib/vakezolovavunulum.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_off0000691e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x691E 5472 bytes
SHA-256: 904ab49da0fbba90314e06f35649e58916266a408aeb52af84dd29d1c0eda1bc
font_01_sfnt_off00007bc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7BC9 11088 bytes
SHA-256: 4860e5ddf1886b843f5cbb9e0750d071fc18a9e8ba973393df4a7083da215ed0
font_02_sfnt_off0000a1c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA1C6 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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