Malicious PDF — malware analysis report

Static analysis result for SHA-256 0cacd0ac0601fce2…

MALICIOUS

PDF

58.6 KB Created: 2020-10-31 13:05:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: cc780ab78a9158e6a2c5a455034dd0b2 SHA-1: 1d3feec507a95714a16d61e0ec23b0260b2d10c8 SHA-256: 0cacd0ac0601fce2d77a6d43da3f37746c1c86c4bca45a63586a32e1a5b0eaf9
162 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains multiple heuristics indicating malicious intent, including links to known malicious redirectors and a link farm. The document body contains a URL that is also flagged as a malicious redirector. The presence of a 'download button' lure further supports the malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to lead the user to malicious content.

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.
  • 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
  • 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://ttraff.club/123?keyword=i+don%2527t+even+know+unblocked In PDF document text
    • https://sewuvemap.weebly.com/uploads/1/3/4/3/134377394/d60d9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385197/normal_5f8d5d8877b1c.pdfIn PDF document text
    • https://zefufewik.weebly.com/uploads/1/3/4/3/134374544/tulamudalof_bujodalomol.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381083/normal_5f8ccec0c4ec5.pdfIn PDF document text
    • https://nuzaguwimera.weebly.com/uploads/1/3/4/4/134492670/lodoxobegot-zunobufitulakej-xasubirogexoro.pdfIn PDF document text
    • https://wisizexabebaj.weebly.com/uploads/1/3/4/4/134461468/jiwinewitewip_metexapevik_kumaniwa_duzukuweboze.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380522/normal_5f8c5fea8f509.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/fbb52a46-b679-46ab-aa0d-0678502a97cd/36189423291.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dafd1411-b0c7-488c-938a-b91ee534ca32/riwobovaneduxurukovi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2eae79c3-3126-4db7-b994-dfa7fcf4864f/kowoxevuzaf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cfd9c80e-3315-4915-9d00-7d6d3c65becd/buvofukobipuganenuvegado.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da7516af-6787-4f30-a01a-ef684006c6f5/the_exorcism_of_emily_rose_download_mp4.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/255a398d-8330-4a55-adce-dd4d58962880/sokodolowilowu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4dffdea1-4c6f-4ddc-8179-5a6d7be3d66e/fafigifibegabujipajifelav.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/59a8d111-a53b-4cd4-b01e-04c8634d9e57/bolalebi.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_off00006949.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6949 11308 bytes
SHA-256: d263e1d66f8b52ee9befb8208cc8bf0817aa4a78752fac6b8e31d42ef67811f7
font_01_sfnt_off00008dfe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DFE 4776 bytes
SHA-256: d008c1ff52d1ca795446ec0634e056001fd7a6f4cbb607a50992ddba819de0f4
font_02_sfnt_off00009e73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9E73 11324 bytes
SHA-256: 661268be727186430e3adddb912aedda3206e0ff2bde7a4ca2f75408d962df5b
font_03_sfnt_off0000c59a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC59A 16068 bytes
SHA-256: 89247d3646e3773572243f1d4b0449240b5d7bcbc9865045ac28c7845acd9c8f

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