Malicious PDF — malware analysis report

Static analysis result for SHA-256 7999bc9640a52400…

MALICIOUS

PDF

55.0 KB Created: 2020-11-09 09:21:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-11
MD5: d2bb10e9c1bf636f0c0c6b8696ad8e2d SHA-1: cac9440989b9bf2878aed502d8af0a4d16b3e240 SHA-256: 7999bc9640a52400ed6af0b6890435d62af3998c2335eff65d7e936915b6f9de
134 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://traffset.ru/123?keyword=my+hero+academia+season+1+ep+17+funimation PDF link annotation
    • https://tenikekiso.weebly.com/uploads/1/3/0/7/130775729/d2e148.pdfIn PDF document text
    • https://xalipifizipig.weebly.com/uploads/1/3/1/3/131379045/4f044a54.pdfIn PDF document text
    • https://xubikorapaja.weebly.com/uploads/1/3/4/3/134335605/3e399.pdfIn PDF document text
    • https://wajatajosow.weebly.com/uploads/1/3/4/4/134487766/juvevojed_felexef_nixediwixamat_wavilowibu.pdfIn PDF document text
    • https://rilofope.weebly.com/uploads/1/3/4/6/134630674/rajagugozi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://fovodifikade.files.wordpress.com/2020/11/bexojitosifepoguzejosaz.pdfIn PDF document text
    • https://tatosotodu.files.wordpress.com/2020/11/28156923706.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/07970031-db5c-45dc-83c7-85aa87d2f267/82483161849.pdfIn PDF document text
    • https://direpupiwabe248790905.files.wordpress.com/2020/11/10856063596.pdfIn PDF document text
    • https://bavukepumem.files.wordpress.com/2020/11/present_perfect_tense_vs_simple_past_worksheet.pdfIn PDF document text
    • https://sipodugegir.files.wordpress.com/2020/11/the_art_of_kissing.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9bde3fb8-cbbc-41b8-b8de-9460945faea2/wuzelawimerisave.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e83ae03-8163-4ee5-9abc-d332536923f7/defebodusuveti.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e09811b-a830-411a-aa30-571360295cf5/dream_aquarium_full_version_download.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006943.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6943 6636 bytes
SHA-256: 1ca996a54aeefb453be717ae3d83694b55668f43ba97875b9f0a0978adc170b7
font_01_sfnt_off00007f8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F8D 5604 bytes
SHA-256: ec7b75b3e765ebccbdfb4dc01ad6959c7a70cc851d790db3b4ad1c86b6d281d9
font_02_sfnt_off0000928f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x928F 11680 bytes
SHA-256: ac7fd6a48b56f438d27e0dd055669bb724e091fc252a681c0c2de83264dfa874
font_03_sfnt_off0000b995.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB995 16060 bytes
SHA-256: 2cca29575edef7a9880cf400a7847cc5df22ba1ee7edc19c7b9bafe603f6c979

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