Malicious PDF — malware analysis report

Static analysis result for SHA-256 68e2e58256ceb472…

MALICIOUS

PDF

91.8 KB Created: 2021-03-03 22:41:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: c2c81ba7c4e4901e31527dc9fa476644 SHA-1: d2d7f43e15506619a305e1388badef7cced36921 SHA-256: 68e2e58256ceb47261cce51b2b3dc4a6fe6b017e316c81de7f8bd1f3899beee2
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many pointing to disposable domains, and is flagged by heuristics as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect the user to malicious content, potentially leveraging embedded JavaScript for exploitation.

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 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://maypoin.ru/award?keyword=sennheiser+ew100+g3+handheld+manual PDF link annotation
    • https://remejatezikame.weebly.com/uploads/1/3/1/0/131070309/fdff08bde01fa92.pdfIn PDF document text
    • https://vavirewafikeja.weebly.com/uploads/1/3/4/4/134402836/d8fb3d11850dbbc.pdfIn PDF document text
    • http://safijejog.mygamesonline.org/72861547111.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425209/normal_60254e2e299d9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369932/normal_602195618ff69.pdfIn PDF document text
    • http://italywow.space/331966458682zcp1.pdfIn PDF document text
    • http://prostotit.site/baxuwimugopa90u27.pdfIn PDF document text
    • http://titanof-filtr.ru/does_powerade_have_caloriesphgng.pdfIn PDF document text
    • http://baffer-shop.space/52133970597ss1vc.pdfIn PDF document text
    • http://uplrezina.site/gitixezul02rpm.pdfIn PDF document text
    • http://lofoporubatul.mygamesonline.org/tabla_puntajes_psu_ciencias_2020.pdfIn PDF document text
    • http://yourcy.com/gozeka4zs7u.pdfIn PDF document text
    • https://rinezafuwokof.weebly.com/uploads/1/3/1/4/131437641/3e74f176287a44.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/xovekolamoxe/nudovanewijudipofevekibit.pdfIn PDF document text
    • http://xuvuzonixo.onlinewebshop.net/84100386866.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012715.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12715 5792 bytes
SHA-256: 476f2a031b2e3bbcb206b6582d927e6687c2e984e0285fb0d8146d32e9253f93
font_01_sfnt_off00013ab7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13AB7 12380 bytes
SHA-256: 08741466297c237c13d0caaf78b72b823c9bcd750e4c8ba539a360328e9a0b14

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