Malicious PDF — malware analysis report

Static analysis result for SHA-256 18e5d3784a7224f8…

MALICIOUS

PDF

72.4 KB Created: 2021-02-22 06:57:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: f94159ea3c2f8a629f0ba2d4e26b8332 SHA-1: f54380223ae4d30a7a4cd87c44f9931211bafe29 SHA-256: 18e5d3784a7224f832c4bf93cb5d79b438cbdd6719f76b5015a2b70a39d9b3f3
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable hosting and are part of a link farm, indicating a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a phishing lure designed to redirect users to malicious content.

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://druttle.ru/strik?utm_term=msi+990fxa+gaming+compatible+processors PDF link annotation
    • https://rajilogibakew.weebly.com/uploads/1/3/5/3/135326989/topora.pdfIn PDF document text
    • http://tryadasert.online/what_is_npv_function_in_excel2b095.pdfIn PDF document text
    • http://saxefitipar.iblogger.org/heart_broken_status_video_for_whatsapp.pdfIn PDF document text
    • http://claire-irk.ru/is_carbon_monoxide_acidic_basic_or_neutralvi8ih.pdfIn PDF document text
    • https://zorutamazu.weebly.com/uploads/1/3/4/0/134096431/770bc867.pdfIn PDF document text
    • https://cdn.sqhk.co/vawadawuleja/Ojcdtgh/pigedofidefadijavilute.pdfIn PDF document text
    • http://dashcamtopbest.com/21876949305nkvio.pdfIn PDF document text
    • https://biwasigefo.weebly.com/uploads/1/3/1/3/131398444/94004.pdfIn PDF document text
    • https://rigozogukex.weebly.com/uploads/1/3/3/9/133986215/3224fe999cda.pdfIn PDF document text
    • https://mekaxojukana.weebly.com/uploads/1/3/1/3/131379168/daval-dewuweja-jaginiva.pdfIn PDF document text
    • https://cdn.sqhk.co/zoluxoni/FiahjTA/pagite.pdfIn PDF document text
    • http://micrometerdigital.xyz/bahnschrift_condensed_bold_fontl021m.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://napubuxuwel.epizy.com/vesemudisikifegen.pdfIn PDF document text
    • http://lawedeg.rf.gd/audio_editor_free_audacity.pdfIn PDF document text
    • http://zisibife.epizy.com/atal_pension_yojana_2019.pdfIn PDF document text
    • http://vugugevijoxudi.rf.gd/jopojivij.pdfIn PDF document text
    • http://luxaneguwes.rf.gd/83320687198.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_off0000ccf4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCF4 5632 bytes
SHA-256: 6d4efccb2af3a170904958ac1a48cc8dcc5c5370fae498d323ef72fb2b3115ca
font_01_sfnt_off0000e005.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE005 11312 bytes
SHA-256: c0c62e77e9580557147d5d1f8417abf7904350a44d6da307f6daf692fecc275f
font_02_sfnt_off0001067b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1067B 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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