Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9548f936e296d89…

MALICIOUS

PDF

79.6 KB Created: 2021-03-18 08:36:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: ef05294dd8548332f7f6a0c851bbee41 SHA-1: be71c3c8cc488defca093bb2a45b5064e6f70ed3 SHA-256: d9548f936e296d89373b3e5b0c0117c633acfba39e3d71865d9cdd9c831cea73
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which point to disposable hosting services and are part of a link farm. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a deliberate attempt to obscure the final malicious destination, which is likely the URL associated with 'pathfinder campaign builder'. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://nipisod.ru/strik?utm_term=pathfinder+campaign+builder PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366312/normal_5fdc2b9de7604.pdfIn PDF document text
    • https://lekamenofujilap.weebly.com/uploads/1/3/4/6/134690267/7161724.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484997/normal_5fc6752e9888d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378830/normal_604b0b27ca989.pdfIn PDF document text
    • https://vabomunebalobi.weebly.com/uploads/1/3/1/8/131856010/6878514.pdfIn PDF document text
    • http://gimakelodikovij.iblogger.org/25366576247.pdfIn PDF document text
    • https://mesopivupezuna.weebly.com/uploads/1/3/5/3/135311967/1775561.pdfIn PDF document text
    • https://vogexuweju.weebly.com/uploads/1/3/0/9/130969932/5175073.pdfIn PDF document text
    • https://nikamajavefuxo.weebly.com/uploads/1/3/1/0/131069808/4827927.pdfIn PDF document text
    • https://womonejod.weebly.com/uploads/1/3/2/6/132681039/397243.pdfIn PDF document text
    • https://jodisugej.weebly.com/uploads/1/3/4/7/134732418/6181729.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472763/normal_6048565b66cee.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487622/normal_5fe06e164fb1e.pdfIn PDF document text
    • https://tefajarusi.weebly.com/uploads/1/3/0/7/130775660/xowixavefevuru.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4472182/normal_5ff4e08b0410b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484999/normal_6049a5c8cd542.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://famowasaj.epizy.com/ejemplos_de_monografias_hechas_en_word_con_normas_apa.pdfIn PDF document text
    • http://relurifiluxel.epizy.com/concussion_diagnosis_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/marimejerebo/6840544446.pdfIn PDF document text
    • https://s3.amazonaws.com/kovibu/rumabimad.pdfIn PDF document text
    • https://s3.amazonaws.com/jeromisixinolib/bmus_sor_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/jijumupade/brookline_ma_police_reports.pdfIn PDF document text
    • https://s3.amazonaws.com/fekaduvopigab/what_does_histology_report_mean.pdfIn PDF document text
    • http://laletowizoz.epizy.com/franchise_your_business_mark_siebert.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_off0000f899.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF899 5532 bytes
SHA-256: d510f636677432911b9ae9111839dd184be81584c4e1cbb3a47d724dd9fde097
font_01_sfnt_off00010b42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B42 11068 bytes
SHA-256: 0f510f57f9b580fa7b89902ad790643a4e366cf0d7b09002ca98c68034fc6d58

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