Malicious PDF — malware analysis report

Static analysis result for SHA-256 83ead1b3bc888216…

MALICIOUS

PDF

43.5 KB Created: 2020-11-09 11:56:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: f43f4d9613b4afcaf092c1dd9b9a56c2 SHA-1: 8a888e73d55322a9ff8e71cfed3614adf053b1c0 SHA-256: 83ead1b3bc888216b1f5b5eeae0bef15e2e0c0f7f98b537e738fb71c851208e4
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=is+credit+score+of+736+good PDF link annotation
    • https://kigefewapese.weebly.com/uploads/1/3/4/5/134528385/mipasarijekaru.pdfIn PDF document text
    • https://kufojomarolov.weebly.com/uploads/1/3/4/4/134401526/1028305.pdfIn PDF document text
    • https://visajemilami.weebly.com/uploads/1/3/4/2/134265887/xaveref.pdfIn PDF document text
    • https://foxagizak.weebly.com/uploads/1/3/4/3/134332010/7296904.pdfIn PDF document text
    • https://walasopi.weebly.com/uploads/1/3/4/5/134588780/revazaze.pdfIn PDF document text
    • https://bidovakufizal.weebly.com/uploads/1/3/4/5/134586087/805458.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/xanebavifamopez/praktijkwerkboek_beveiliger_2.pdfIn PDF document text
    • https://s3.amazonaws.com/nitatotol/76343492159.pdfIn PDF document text
    • https://s3.amazonaws.com/dotivaf/wovinugozew.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1373803-7f87-485c-aa54-e387d432afdc/que_es_un_prisma_cuadrangular.pdfIn PDF document text
    • https://s3.amazonaws.com/lodunixodetum/kai_hiwatari_and_hilary.pdfIn PDF document text
    • https://s3.amazonaws.com/napisakaluja/my_p2p4u_live_football.pdfIn PDF document text
    • https://s3.amazonaws.com/dogazisuze/dewalt_pressure_washer_manual_3400.pdfIn PDF document text
    • https://s3.amazonaws.com/dadupawo/bumekuxenivawatoz.pdfIn PDF document text
    • https://s3.amazonaws.com/podawakumepewez/adobe_acrobat_dc_reader_pour_android.pdfIn PDF document text
    • https://s3.amazonaws.com/bojafazes/payroll_system_documentation.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_off00006a3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A3B 5280 bytes
SHA-256: f326baf89a01e670890cced170f6dfd35122419334b2dcf2ad3800bc6a59696d
font_01_sfnt_off00007c4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C4F 10792 bytes
SHA-256: ce6354a51cbef9cca39dd54127e2ba3555caa677b6bc1ff9e650293cc34efa69