Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2f1ef5ae2af6440…

MALICIOUS

PDF

77.7 KB Created: 2021-05-06 01:27:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 6bcd4248238d9f1d5a9df566ac15f458 SHA-1: 5a37c1f33cc05201360f832c9e154a1e7fd1a568 SHA-256: c2f1ef5ae2af64401d49c13ce6aa731aaa73b8e0cfd81f260cd6bb740c8f7ad7
186 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 6

  • 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.
  • 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://soxebez.ru/strik?utm_term=offline+english+grammar+checker+software+free+download PDF link annotation
    • https://bujupovira.weebly.com/uploads/1/3/4/4/134472582/sokuxakijil.pdfIn PDF document text
    • http://pimipaxu.22web.org/gonorrhea_chlamydia_screening_guidelines.pdfIn PDF document text
    • https://pegufozexak.weebly.com/uploads/1/3/5/3/135317465/2651011.pdfIn PDF document text
    • https://buresususotolo.weebly.com/uploads/1/3/2/7/132710635/xedipunewibapef_misusawib_wawerezulut_miwovuzasigi.pdfIn PDF document text
    • http://sizijevoji.iblogger.org/astell_kern_ak70.pdfIn PDF document text
    • http://lokifasumefi.iblogger.org/akali_guide_top.pdfIn PDF document text
    • https://zabepufi.weebly.com/uploads/1/3/4/6/134681717/waboxef_kubatobade_moxotirede_lunobej.pdfIn PDF document text
    • https://latovadavubu.weebly.com/uploads/1/3/4/7/134716683/gosejola-satagumeliw-fifowela-kitigotu.pdfIn PDF document text
    • https://faxarumi.weebly.com/uploads/1/3/1/6/131606834/fodexajatixo.pdfIn PDF document text
    • http://polanuredun.iblogger.org/banded_iron_formation_definition.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://jotozig.rf.gd/14084467552.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/12bdd34d-ae06-469f-90e6-d760266031f7/como_convertir_de_mililitros_a_gramos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/443e3af5-d1ac-42b9-8f3d-de8a6d6e62f3/my_dyson_dc16_keeps_cutting_out.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/92e2bb71-d8ef-4625-a359-14573bae0397/nazawovuzaripusapisegig.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd2bc836-630b-436d-9e5c-b542c4bcc85e/4797593268.pdfIn PDF document text
    • http://gokubamo.epizy.com/spotify_apk_android_8._0.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9be724d1-f3df-49cb-968d-9e7653e09dd8/can_python_be_used_for_data_analysis.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e3d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3D3 5408 bytes
SHA-256: 73b3da85d9c4cc145289657ad6baa734c3e3f589ffe0887ba6a74dfbf5214cf8
font_01_sfnt_off0000f619.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF619 11000 bytes
SHA-256: 5493787a6ce4032d9de098a3a8ae475ddfde909f03d945dba2b39a5d47d4e3cf
font_02_sfnt_off00011b64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B64 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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