Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f820e6404628d0d…

MALICIOUS

PDF

70.4 KB Created: 2021-04-04 22:28:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: cf08f39c492b06b9551b7cda16efb619 SHA-1: 220eaeae76166da1d756f9c0b99ce4720a2daf6a SHA-256: 8f820e6404628d0d8186b7a6ad3193719a633a7ae156ff554016276e5f2fd2b8
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or phishing attempt. The ClamAV detection and ML classifier further indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the presence of numerous external URLs points towards an attempt to redirect the user 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 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.
  • 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://golowaki.ru/strik?utm_term=user+stories+applied+for+agile+software+development+free+download PDF link annotation
    • https://wesoxiworikezux.weebly.com/uploads/1/3/1/3/131380467/cc432b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464539/normal_5fd6c7491cb5b.pdfIn PDF document text
    • https://zamovolipizutuj.weebly.com/uploads/1/3/1/0/131070940/tizexakosola_xejarenanugeb_kevipisad_jafuxosise.pdfIn PDF document text
    • http://usene.xyz/wesulawubidoviqa.pdfIn PDF document text
    • https://jizawabule.weebly.com/uploads/1/3/5/9/135966138/4244813.pdfIn PDF document text
    • https://kilexudu.weebly.com/uploads/1/3/5/3/135347894/073fbca70b41f2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392861/normal_5fe0b4a922545.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460447/normal_5feedfb2744e6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381347/normal_5ff2a3a386880.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449602/normal_6000a24b9eebd.pdfIn PDF document text
    • http://vannabanyavsedela.xyz/8511517789914lsl.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477137/normal_6018840b7fc8f.pdfIn PDF document text
    • https://zumusikibalagop.weebly.com/uploads/1/3/4/0/134096359/tusavogasije_jogosamusete_piboz_lalobowuzumek.pdfIn PDF document text
    • https://sajamokof.weebly.com/uploads/1/3/4/5/134599006/tukakewat-vipebexiraga-mafasefa-vetezokaro.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://44034db3-6cdd-4729-adf3-7ccd6afcf354.filesusr.com/ugd/9fe9cc_0d0909cac7c94d1ca350bee5c2fc5e68.pdf?index=trueIn PDF document text
    • https://72cee60b-533f-4fda-9f40-87b1bb6f0553.filesusr.com/ugd/590778_4d581f9d2f60497c8c03a55115d45417.pdf?index=trueIn PDF document text
    • https://f9a132f0-acc9-4761-b7d8-38025aedd849.filesusr.com/ugd/5c71d6_68ba140edae940749dc6bbf2e8406e13.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_off0000d3fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3FD 5504 bytes
SHA-256: 99d9a22a4824ad54242e4b40455715954e4131171bc65d6acf602b1f55f1697a
font_01_sfnt_off0000e6c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6C1 10976 bytes
SHA-256: be234c056cb93c7cb01749363ca73944c8f339f8ff8c7320d09d9916aa713a3f

Open this report in the interactive analyzer, or submit your own file for analysis.