Malicious PDF — malware analysis report

Static analysis result for SHA-256 6606d36068dc61cb…

MALICIOUS

PDF

74.7 KB Created: 2021-02-12 18:39:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: acea3856a66644f1059c9b9ee66d9c25 SHA-1: f341d3de0be971993cb636d30b981c0a9f1856c3 SHA-256: 6606d36068dc61cb344d2a29f274d89f85d3d6abff78ae7ecc40b2656290ab3b
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with one specifically pointing to a domain that appears to be a link farm designed to redirect users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The presence of external URIs and a link farm heuristic further supports this, suggesting the document is a lure to a malicious site.

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/123?utm_term=10-6+practice+the+distance+and+midpoint+formulas+answers PDF link annotation
    • http://lnstagramverifiedsbadgeform.com/dopinozotosijedatanmlf.pdfIn PDF document text
    • http://axecheat8.xyz/96726271964ufbz8.pdfIn PDF document text
    • http://limaxinsto.xyz/imagenes_para_colorear_de_princesas_disneyzz8qp.pdfIn PDF document text
    • http://gotedez.22web.org/93625531242.pdfIn PDF document text
    • http://zarabatyivat.ru/multiplication_of_fraction_word_problems_worksheetsoatok.pdfIn PDF document text
    • http://yellownatural.space/ellipse_worksheets_with_answersmgwxd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457862/normal_600d7e9c1b658.pdfIn PDF document text
    • http://hellesypakk.online/52838714551eg4i1.pdfIn PDF document text
    • http://snegny.com/borusotig5pz3m.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4498348/normal_600f5dbcae151.pdfIn PDF document text
    • http://helplnstagramcontact6088758.com/266809833361mizv.pdfIn PDF document text
    • http://edaruzal.xyz/july_2020_calendar_template_wordhtizp.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/dowesitobuga/79085034091.pdfIn PDF document text
    • http://zuvemodu.rf.gd/rinepadularoxalejerunake.pdfIn PDF document text
    • http://vipiwimepi.epizy.com/jasper_report_table.pdfIn PDF document text
    • https://s3.amazonaws.com/rozebofukixus/free_arcgis_pro_2._4.pdfIn PDF document text
    • https://s3.amazonaws.com/vetamedisoz/rironi.pdfIn PDF document text
    • https://s3.amazonaws.com/wipotegadodorek/40781424328.pdfIn PDF document text
    • https://s3.amazonaws.com/gelawiweza/digev.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_off0000e6b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6B5 5772 bytes
SHA-256: 2d4ec62a07e03f28f15268c318fef22c2a5499a0aa2927b5b08bb0b6ad59f879
font_01_sfnt_off0000fa45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA45 10224 bytes
SHA-256: 5eb96752b9e7a5a05c44ed3501302054706afabb36f2ff43ce37554b5a10c9cd

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