Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d52d6e9adf2251f…

MALICIOUS

PDF

70.9 KB Created: 2020-11-09 08:43:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 390b67858f26d4e1fb2405c46c9597e8 SHA-1: bac0621e2f2955f2cc4cfccb865b2a0e2afb13c2 SHA-256: 5d52d6e9adf2251f583f8370db5ba66afa3b45af02f136b918767f9cbb5f9057
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://traffset.ru/aws?keyword=dipper+s+guide+to+the+unexplained+season+5 PDF link annotation
    • https://lakaporizad.weebly.com/uploads/1/3/4/2/134234628/4480432.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://sizixef.files.wordpress.com/2020/11/indonesia_visa_application_form.pdfIn PDF document text
    • https://s3.amazonaws.com/zinudipir/96006871482.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da94c72a-5df6-4fb6-88c1-3bd16160631d/nelimel.pdfIn PDF document text
    • https://juvibix.files.wordpress.com/2020/11/wazasusegupaxusijip.pdfIn PDF document text
    • https://s3.amazonaws.com/mejigavukolu/1512436354.pdfIn PDF document text
    • https://s3.amazonaws.com/zikeko/85273244175.pdfIn PDF document text
    • https://s3.amazonaws.com/sorogamat/95396341725.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/19f959d9-02e0-4ca1-ae8c-ed35528197e8/35697537722.pdfIn PDF document text
    • https://s3.amazonaws.com/desekusoxi/rokunujapaxe.pdfIn PDF document text
    • https://kexumolu.files.wordpress.com/2020/11/44001683823.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_off0000affe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAFFE 5292 bytes
SHA-256: f45a89221eb08d4d12b4609d208783f7639dd215d4088d02877fac2616c87784
font_01_sfnt_off0000c1fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC1FD 12744 bytes
SHA-256: 9de0aa43dd60755fdda3a6cd09b0243e0b65a36847037c41efae74e702745649
font_02_sfnt_off0000eb82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB82 16036 bytes
SHA-256: 354dce64f07f3d7acdf6a04edf763950ffbfec4edcbb4bfe17b65a83544077bb
font_03_sfnt_off0000ffea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFEA 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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