Malicious PDF — malware analysis report

Static analysis result for SHA-256 01b72ef013ae9ec4…

MALICIOUS

PDF

44.0 KB Created: 2020-11-03 12:46:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 46cbd3b0ef164e25c14b1bb3705e420b SHA-1: 17b827dd581e724dc81122977eca84ba9202632d SHA-256: 01b72ef013ae9ec4d68d5090491f9c2e465628301424a78ea738536ed67c057e
162 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

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://ggtraff.ru/aws?keyword=tamilyogi+movies+2019+download+isaimini In PDF document text
    • https://cdn-cms.f-static.net/uploads/4420237/normal_5f96333dd7a8e.pdfIn PDF document text
    • https://jutivodip.weebly.com/uploads/1/3/4/4/134489611/89004.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367275/normal_5f9c1daa4b9b3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377120/normal_5f92746ce727e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368951/normal_5f9fe4460fc2d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419650/normal_5f98d75a529b6.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/3be672fb-dff6-4e20-aafa-856c33ce1003/6193163422.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc35f8d9-8fd4-4afe-8454-8f87405e49ab/youtube_avi_film_indir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2320f9be-1777-4bc9-869a-3c3131f2b8df/dizexefekisego.pdfIn PDF document text
    • https://s3.amazonaws.com/lakadutof/24661238450.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/797e7832-a57f-4d92-a2e4-01573eef6bce/ipad_user_guide_for_ios_10.3_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2355de21-3d4f-4b17-9ae2-b116a92e643f/80084460729.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_off00006b7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B7F 5732 bytes
SHA-256: 13e21f602909e8b164dece641bce7c79f4c6b6ad23af109008a926844e3a730a
font_01_sfnt_off00007f19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F19 10496 bytes
SHA-256: 57ca290c9404656692451f3eb5c36f4074a1772694858144c43800e6924dec78

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