Malicious PDF — malware analysis report

Static analysis result for SHA-256 224039257f6686ae…

MALICIOUS

PDF

81.5 KB Created: 2021-03-20 17:30:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 8815baa59ebeb6de5c109a4a6737c136 SHA-1: 94a0c525854c695610fe61ba6373ba9f84bdf6e5 SHA-256: 224039257f6686aefef2a1d8cae33703dafef7c320de5fdc7e81737d9b163a8d
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to disposable hosting, suggesting it functions as a link farm for phishing or malware distribution. The embedded content, though heavily obfuscated, likely serves to disguise the true nature of the document and its links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 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://gimoguvi.ru/strik?utm_term=hp+deskjet+2132+printer+price PDF link annotation
    • https://pupazugosabi.weebly.com/uploads/1/3/4/8/134868946/wifedurokimep.pdfIn PDF document text
    • https://fenipedixov.weebly.com/uploads/1/3/5/3/135385823/kemup.pdfIn PDF document text
    • https://vamububok.weebly.com/uploads/1/3/5/3/135317225/liwubizid.pdfIn PDF document text
    • https://fuvepuzineg.weebly.com/uploads/1/3/4/4/134463404/9528435.pdfIn PDF document text
    • https://tokubarip.weebly.com/uploads/1/3/1/3/131380438/mepowarabizixopufib.pdfIn PDF document text
    • https://garanokuwepo.weebly.com/uploads/1/3/0/8/130874617/rekepevarepuz.pdfIn PDF document text
    • https://zotejukewas.weebly.com/uploads/1/3/5/3/135347558/974b258edda.pdfIn PDF document text
    • http://jidapuxedepu.medianewsonline.com/2987733479.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://1cbf0fd9-62af-4102-a3dc-982f361539e7.filesusr.com/ugd/bfbc46_6a2e59756bae4db085d0c1442e9ce3f6.pdf?index=trueIn PDF document text
    • https://6f1239e7-da96-47bf-8adb-22d47a96a9da.filesusr.com/ugd/bb5a15_d18f7c4545684b9da58835aff58778b5.pdf?index=trueIn PDF document text
    • https://3e3188f7-d9e9-48da-9af6-4e6760718ee0.filesusr.com/ugd/4f7562_aa4a3720f3ec42268ab5bc28c3dc20d8.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jivuxo/8162777010.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc8c40a7-31be-44a8-a461-e3eb78b37f63/22888739791.pdfIn PDF document text
    • https://d128792e-e0a8-46e0-98ed-b941f5da69b2.filesusr.com/ugd/b98abb_75641c9c1b1642bb9a0a2ec469263dbe.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/76f38b09-1f30-4950-abfd-a05f876673e3/irulu_walknbook_w1005.pdfIn PDF document text
    • https://s3.amazonaws.com/tugumeb/descargar_snaptube_para_android_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ef76a48-b825-490c-8e6d-abf7b91d23d9/review_skyworth_tv.pdfIn PDF document text
    • http://jubogaju.atwebpages.com/endangered_species_worksheets.pdfIn PDF document text
    • http://vekabun.myartsonline.com/1580556807.pdfIn PDF document text
    • https://47e4df30-8702-49a4-8bd5-327e1546ff06.filesusr.com/ugd/379272_98876300bd3246a68f8220ed22f584b4.pdf?index=trueIn 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_off000101dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101DC 5276 bytes
SHA-256: 2dcb375162a35f06362a4dab67fd2614d43eeac6ae73b64f7c42900a2a62d355
font_01_sfnt_off000113ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113EE 10892 bytes
SHA-256: c90d897b68e11d6ff4cfc0dcff6d553d5e90398a3041e2764a7c975638c25fc3