Malicious PDF — malware analysis report

Static analysis result for SHA-256 12b0fe3b64057151…

MALICIOUS

PDF

56.9 KB Created: 2020-11-04 13:11:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 4ba5c0256ed4ac5f2c0e53f689ba29c8 SHA-1: 19f02fdb6cda12f4746fbaeb06bf0af929bf0683 SHA-256: 12b0fe3b6405715143e8c93a1c2ec682f983f5c7f825b9581cf51792a1c0c445
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://ttraff.cc/123?keyword=sunpak+selfie+wand+manual In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366646/normal_5f8f5eb6e8a1d.pdfIn PDF document text
    • https://zulatikuwa.weebly.com/uploads/1/3/0/7/130776211/e618fce96498c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369141/normal_5f948e0883448.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • https://s3.amazonaws.com/jesidofefe/nobeganeno.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/79ac40df-9c88-472c-89bb-5e9792e125c9/furitolujodajagojomitad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3a000aa-06fd-416e-a186-852bd96a4774/9121834506.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b445e5f3-aa3a-41a9-93f5-7f54f7d7ef9f/xiziro.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/57012183-2cd2-4716-a0f6-7177fb33dd1c/vilekajuzogesipezegub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d6d7131e-1a90-431b-aec9-f695cc4250f2/40109055873.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d8d8e2a5-161a-44d0-8bf6-b9a87164fc39/46854023381.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://www.gnu.org/licenses/gpl.htmlIn PDF document text

Related samples 3

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008401.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8401 5348 bytes
SHA-256: 087cdb7adff0f73e38ebe0d7fade97be7707aa38c14b6d06eea09cbc5a07f40a
font_01_sfnt_off00009633.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9633 8696 bytes
SHA-256: 8cd87ecdfb391d6de128ce0e6d665b051c8fd54235eb17156f814b884a5c88fd
font_02_sfnt_off0000ae1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE1F 12076 bytes
SHA-256: 2bd48da7eba23ac020d72ac111c012fdc72fbacaaec74abc9c28704bcc5d4f63

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