Malicious PDF — malware analysis report

Static analysis result for SHA-256 315a6053f2375ba4…

MALICIOUS

PDF

66.9 KB Created: 2020-11-13 10:55:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: b28a2696b505c937efd6c76131e18ca2 SHA-1: 632151553a02dcd0abc2a236c5689aed116d7d6a SHA-256: 315a6053f2375ba492d10b5a6ce8c5d9aa96e09baa2404d78b8e539cbf871841
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 0.9997

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://traffking.ru/123?utm_term=geometry+final+exam+study+guide PDF link annotation
    • https://robitejipesiz.weebly.com/uploads/1/3/4/3/134375849/9555553.pdfIn PDF document text
    • https://rusizugijenu.weebly.com/uploads/1/3/4/3/134340450/gufumoxoxexe.pdfIn PDF document text
    • https://sopaxibifezubin.weebly.com/uploads/1/3/4/6/134608036/ce542db023ad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366647/normal_5fa4ac428f8e0.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/ea30efa5-dcf0-4cba-b333-97cf4d4a9a65/joniviluwonijafelekirafu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/031c2ce6-b734-4895-8769-7a37f71afd7b/71346007196.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/36b8e12d-90fa-41ba-9c3b-20739b9dfdf9/38504586497.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2bda88f7-0460-4102-ad3c-241cae040004/29732724407.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f86574e-b004-4e5f-97ed-c3bb96d8c5f8/43645626698.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e59a7345-2a8b-4ffc-82a7-1f09cb2fef88/werecreatures_around_the_world.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/90d228ce-fb5c-4f08-8e5d-29c0cd32da33/strategic_management_planning_for_domestic_and_global_competition_14th_edition_ebook.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_off0000ca4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA4D 5428 bytes
SHA-256: cf7885b9f6d908ace06019329f42d21477a841c07601f9e2b59abf50d37f2610
font_01_sfnt_off0000dcc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCC1 10024 bytes
SHA-256: f279458a1c9b62fe2e2b4db3ddc380d443e98560d0bfd02c48ecb36c8c17d2f7

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