Malicious PDF — malware analysis report

Static analysis result for SHA-256 5fc16ac4c91ce5a9…

MALICIOUS

PDF

83.0 KB Created: 2020-11-24 09:07:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 6e862a8212ea1581a42103799b81501c SHA-1: d618d0e2102cc3f824a8a1737b3d5d88c5e1e4c6 SHA-256: 5fc16ac4c91ce5a98972e9d81aa43955216e085c4b102cdcbe535a2088ef24a0
156 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 ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://traffine.ru/123?utm_term=marine+paints+manufacturers PDF link annotation
    • https://bizumoku.weebly.com/uploads/1/3/2/6/132681494/xanixaja.pdfIn PDF document text
    • https://pikowezapuxo.weebly.com/uploads/1/3/2/6/132681044/rowuvumosi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426953/normal_5f9f41a498fa8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425504/normal_5f9d30f01cf08.pdfIn PDF document text
    • https://tejebufu.weebly.com/uploads/1/3/4/3/134353082/mavoniguxizub.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/130eed86-a483-472f-9914-2194b2b92dbc/zorigexoseliwujekora.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/300640f0-ac0c-4d20-86fc-158a6bb3a27a/16655424051.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bec7d4a8-7fd8-4b8c-b744-d6dc507d3574/14473036647.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d76c927-a17b-4a4c-9c39-2e24bb70e4f1/tikaxuzaludepepe.pdfIn PDF document text
    • https://s3.amazonaws.com/fedufiporara/vidmate_download_apk_old_version.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/60efd7cd-c8f2-4366-8d9b-d3d316ab4d61/pukutiwokazabijiwedubawe.pdfIn PDF document text
    • https://s3.amazonaws.com/toliwudalamem/htgawm_episode_guide_season_3.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/250ed586-76c4-4479-a99a-a27be5e81339/52946955155.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/97d9f9e1-8d04-48a1-ba3a-a619288b31e3/posie_l_air_en_conserve.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

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001091e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1091E 5132 bytes
SHA-256: 36efbaf973cf5b96848636dc01f73bb8785a0eeb2e0d99f7db31e6b0104584fb
font_01_sfnt_off00011a8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A8F 10844 bytes
SHA-256: 507db94b540d043c35564fc04e1b3bc4847850997806c6c7dbb51f6bf2176faf

Open this report in the interactive analyzer, or submit your own file for analysis.