Malicious PDF — malware analysis report

Static analysis result for SHA-256 b15a1e273c8f6b35…

MALICIOUS

PDF

70.4 KB Created: 2021-06-13 08:32:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: b65cf5c3169c7e76cd2d00b0c440c499 SHA-1: 505987bed738d9a3b5cda6f3c3b64642f0b34299 SHA-256: b15a1e273c8f6b35373db43aa3e0ef595a5f6b7f55163079cc0377ea8d371d78
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The embedded URL points to a domain associated with link farming and disposable hosting, suggesting a phishing or malware distribution scheme. Although no scripts were explicitly extracted, the PDF structure and embedded URI heuristic suggest it's designed to redirect the user to the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://allytemp.ru/pbw?utm_term=peacock+mandala+coloring+pages PDF link annotation
    • https://static.s123-cdn-static-d.com/uploads/4387035/normal_60b20de47ed52.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379046/normal_5ff1f0afe4f88.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/c1d45b5f-f79e-48a0-a6e9-fead819b5571/keurig_model_b60_filter.pdfIn PDF document text
    • http://gifavipa.pbworks.com/w/file/fetch/144417525/free_movies_plus_app_for_pc.pdfIn PDF document text
    • http://gosavepifij.pbworks.com/w/file/fetch/144694863/5095053234.pdfIn PDF document text
    • http://pokatufaxi.pbworks.com/f/frozen_fever_full_movie_in_tamil_in_isaimini.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8623fb1-0946-4876-aa4b-865872a34072/84265302237.pdfIn PDF document text
    • http://sisiwovad.pbworks.com/f/cat_5e_wiring.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b2c421b5-9312-4cfc-8d83-1d44fef9a246/60660043904.pdfIn PDF document text
    • http://jumogitakos.pbworks.com/f/single_group_pretest_posttest_design.pdfIn PDF document text
    • http://rukuvekuke.pbworks.com/w/file/fetch/145193997/kisix.pdfIn PDF document text
    • http://mulasamesi.pbworks.com/f/32391694539.pdfIn PDF document text
    • http://jilawuxifi.pbworks.com/w/file/fetch/144552756/mamexabojus.pdfIn PDF document text
    • http://namikikis.pbworks.com/f/kosivogefedutig.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de279953-74f5-415c-9ad4-e1dba0cd7e38/how_long_do_you_leave_the_hair_dye_in.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e0d1eaa3-d12d-4bb0-b0d3-30a5d1c96a2a/harbor_breeze_remote_replacement_parts.pdfIn PDF document text
    • http://xuresasadox.pbworks.com/w/file/fetch/144669786/47637047599.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ca8250a-0c79-44ba-a5e2-3087835a11a0/82010218049.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_off0000d6b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6B2 5460 bytes
SHA-256: 239cc4b009ae57254be705da3a2e51e41bfcfe93f68b8d2403728b66b70b219e
font_01_sfnt_off0000e92d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE92D 10424 bytes
SHA-256: e78527022e32dca843f4d4dbd61ffbc111c23d157ddc5ca0582776fd8cb1f9a6

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